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Document and Entity Information	12 Months Ended
Document and Entity Information	Dec. 31, 2016 shares
Document and Entity Information
Entity Registrant Name	CTRIP COM INTERNATIONAL LTD
Entity Central Index Key	0001269238
Document Type	20-F
Document Period End Date	Dec. 31, 2016
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	64,155,412
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY

CONSOLIDATED STATEMENTS OF INCOME/(LOSS) AND COMPREHENSIVE INCOME/(LOSS)	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2016 CNY (¥) ¥ / shares shares	Dec. 31, 2015 CNY (¥) ¥ / shares shares	Dec. 31, 2014 CNY (¥) ¥ / shares shares
Revenues:
Accommodation reservation	$ 1,052,709,040	¥ 7,308,958,863	¥ 4,616,649,394	¥ 3,201,426,933
Transportation ticketing	1,271,282,813	8,826,516,571	4,453,885,749	2,950,072,484
Packaged-tour	332,737,850	2,310,198,894	1,667,945,350	1,055,369,205
Corporate travel	87,587,804	608,122,125	473,245,440	373,407,012
Others	105,759,785	734,290,185	285,220,475	192,281,473
Total revenues	2,850,077,292	19,788,086,638	11,496,946,408	7,772,557,107
Less: business tax and related surcharges	(80,605,909)	(559,646,824)	(599,378,347)	(425,638,738)
Net revenues	2,769,471,383	19,228,439,814	10,897,568,061	7,346,918,369
Cost of revenues	(681,225,723)	(4,729,750,192)	(3,043,439,819)	(2,100,606,413)
Gross profit	2,088,245,660	14,498,689,622	7,854,128,242	5,246,311,956
Operating expenses:
Product development	(1,107,218,998)	(7,687,421,506)	(3,296,692,936)	(2,321,348,753)
Sales and marketing	(844,149,133)	(5,860,927,432)	(3,087,989,953)	(2,214,209,719)
General and administrative	(362,785,420)	(2,518,819,170)	(1,088,402,408)	(861,550,628)
Total operating expenses	(2,314,153,551)	(16,067,168,108)	(7,473,085,297)	(5,397,109,100)
Income/(loss) from operations	(225,907,891)	(1,568,478,486)	381,042,945	(150,797,144)
Interest income	81,685,814	567,144,610	445,767,036	304,583,544
Interest expense	(105,418,816)	(731,922,838)	(302,425,829)	(162,354,675)
Other income/(expense)	(3,866,958)	(26,848,287)	2,480,979,830	43,820,635
Total	(253,507,851)	(1,760,105,001)	3,005,363,982	35,252,360
Income tax expense	(68,847,621)	(478,009,033)	(470,188,423)	(130,821,156)
Equity in income/(loss) of affiliates	86,689,209	601,883,179	(135,780,312)	187,191,141
Net income/(loss)	(235,666,263)	(1,636,230,855)	2,399,395,247	91,622,345
Net loss attributable to non-controlling interests	29,602,140	205,527,660	108,260,637	151,117,436
Net income/(loss) attributable to Ctrip.com International, Ltd.	(206,064,123)	(1,430,703,195)	2,507,655,884	242,739,781
Net income/(loss)	(235,666,263)	(1,636,230,855)	2,399,395,247	91,622,345
Other comprehensive income:
Foreign currency translation	(46,605,443)	(323,581,599)	(489,917,917)	(66,759,799)
Unrealized securities holding gains, net of tax	131,719,691	914,529,809	606,415,822	137,704,595
Reclassification adjustment due to disposal of available-for-sale investment, net of tax	(20,258,067)	(140,651,759)
Total comprehensive income/(loss)	(170,810,082)	(1,185,934,404)	2,515,893,152	162,567,141
Comprehensive loss attributable to non-controlling interests	29,602,140	205,527,660	108,260,637	151,117,436
Comprehensive income/(loss) attributable to Ctrip.com International, Ltd.	$ (141,207,942)	¥ (980,406,744)	¥ 2,624,153,789	¥ 313,684,577
Weighted average ordinary shares outstanding
- Basic shares (in shares)	59,166,582	59,166,582	37,797,698	34,289,170
- Diluted shares (in shares)	59,166,582	59,166,582	47,375,248	38,207,858
Product development
Share-based compensation included in Operating expense above is as follows:
Share-based compensation	$ 299,512,387	¥ 2,079,514,506	¥ 291,642,931	¥ 184,664,576
Sales and marketing
Share-based compensation included in Operating expense above is as follows:
Share-based compensation	56,552,162	392,641,663	65,574,256	54,391,508
General and administrative
Share-based compensation included in Operating expense above is as follows:
Share-based compensation	$ 156,641,587	¥ 1,087,562,537	¥ 285,379,287	¥ 257,587,405
Ordinary shares
Earnings/(loss) per ordinary share/ADS
- Basic (in RMB or dollars per share) \| (per share)	$ (3.48)	¥ (24.18)	¥ 66.34	¥ 7.08
- Diluted (in RMB or dollars per share) \| (per share)	(3.48)	(24.18)	56.85	6.35
ADS
Earnings/(loss) per ordinary share/ADS
- Basic (in RMB or dollars per share) \| (per share)	(0.44)	(3.02)	8.29	0.88
- Diluted (in RMB or dollars per share) \| (per share)	$ (0.44)	¥ (3.02)	¥ 7.11	¥ 0.79

CONSOLIDATED BALANCE SHEETS	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 CNY (¥)
Current assets:
Cash and cash equivalents	$ 2,655,146,371	¥ 18,434,681,251	$ 2,767,632,821	¥ 19,215,674,674
Restricted cash	251,258,866	1,744,490,307		2,286,882,592
Short-term investment	2,032,674,966	14,112,862,288		8,235,785,516
Accounts receivable, net	666,112,390	4,624,818,322		3,150,768,364
Due from related parties	113,438,569	787,603,986		961,791,458
Prepayments and other current assets	893,991,889	6,206,985,686		6,749,965,827
Total current assets	6,612,623,051	45,911,441,840		40,600,868,431
Long-term deposits and prepayments	165,242,575	1,147,279,197		486,785,968
Long-term loan receivable	31,063,381	215,673,057		578,524,154
Long-term receivables due from related parties	86,405,479	599,913,241		543,911,586
Land use rights	14,337,429	99,544,772		102,328,181
Property, equipment and software	805,409,777	5,591,960,081		5,555,959,499
Investments	2,957,341,548	20,532,822,365		13,870,523,498
Goodwill	8,067,864,841	56,015,185,590		45,690,440,903
Intangible assets	2,005,584,032	13,924,769,931		11,007,915,171
Deferred tax assets, non-current	54,056,113	375,311,594		405,334,569
Total assets	20,799,928,226	144,413,901,668		118,842,591,960
Current liabilities:
Short-term debt and current portion of long-term debt	991,978,912	6,887,309,589		12,710,213,398
Accounts payable	1,048,363,976	7,278,791,082		5,944,501,681
Due to related parties	120,613,761	837,421,345		2,062,965,953
Salary and welfare payable	361,289,177	2,508,430,757		1,196,691,839
Taxes payable	156,163,248	1,084,241,429		1,641,379,425
Advances from customers	1,179,726,351	8,190,840,057		5,955,827,306
Accrued liability for customer reward program	94,796,296	658,170,680		593,346,816
Other payables and accruals	410,459,635	2,849,821,247		3,561,167,650
Total current liabilities	4,363,391,356	30,295,026,186		33,666,094,068
Deferred tax liabilities, non-current	519,643,210	3,607,882,808		3,045,259,390
Long-term debt	4,990,735,065	34,650,673,553		18,354,608,260
Other long-term liabilities	48,907,766	339,566,619		91,702,261
Total liabilities	9,922,677,397	68,893,149,166		55,157,663,979
Commitments and contingencies (Note 21)
Shareholders' equity
Share capital (US$0.01 par value; 175,000,000 shares authorized, issued shares as of December 31, 2015 and 2016: 54,744,585 and 67,402,721; outstanding shares as of December 31, 2015 and 2016: 51,167,228 and 64,105,412	714,440	4,960,354		4,121,245
Additional paid-in capital	9,480,051,664	65,819,998,701		37,991,678,952
Statutory reserves	34,206,513	237,495,820		168,940,969
Accumulated other comprehensive income	145,524,086	1,010,373,732		560,077,281
Retained earnings	964,940,316	6,699,580,613		8,198,838,659
Less: Treasury stock (3,577,357 and 3,247,309 shares as of December 31, 2015 and 2016, respectively.)	(321,989,703)	(2,235,574,510)		(2,372,927,372)
Total Ctrip's shareholders' equity	10,303,447,316	71,536,834,710		44,550,729,734
Non-controlling interests	573,803,513	3,983,917,792		19,134,198,247
Total shareholders' equity	10,877,250,829	75,520,752,502		63,684,927,981
Total liabilities and shareholders' equity	$ 20,799,928,226	¥ 144,413,901,668		¥ 118,842,591,960

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Shareholders' equity
Share capital, par value (in dollars per share)	$ 0.01	$ 0.01
Share capital, shares authorized	175,000,000	175,000,000
Share capital, shares issued	67,402,721	54,744,585
Share capital, shares outstanding	64,105,412	51,167,228
Treasury stock, shares	3,247,309	3,577,357

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY	Ordinary shares CNY (¥) shares	Additional paid-in capital CNY (¥)	Statutory reserves CNY (¥)	Accumulated other comprehensive income/(loss) CNY (¥)	Retained earnings CNY (¥)	Treasury stock USD ($) shares	Treasury stock CNY (¥) shares	Total Ctrip.com International, Ltd. shareholders' equity CNY (¥)	Non-controlling interests CNY (¥)	USD ($) shares	CNY (¥) shares
Balance at Dec. 31, 2013	¥ 3,033,490	¥ 4,088,484,766	¥ 118,449,230	¥ 372,634,580	¥ 5,498,934,733	$ (3,777,087)	¥ (1,551,141,268)	¥ 8,530,395,531	¥ 199,690,428		¥ 8,730,085,959
Balance (in shares) at Dec. 31, 2013 \| shares	33,828,251
Changes in shareholders' equity
Issuance of common stock pursuant to share incentive plan	¥ 51,483	221,534,465						221,585,948			¥ 221,585,948
Issuance of common stock pursuant to share incentive plan (in shares) \| shares	835,042
Issuance of ordinary shares for the exercise of stock options (in shares) \| shares										573,351	573,351
Share-based compensation		496,643,489						496,643,489			¥ 496,643,489
Appropriations to statutory reserves			15,649,517		(15,649,517)
Repurchasing common stock							¥ (446,155,147)	(446,155,147)			(446,155,147)
Repurchasing common stock (in shares) \| shares	(392,306)					(392,306)	(392,306)
Foreign currency translation adjustments				(66,759,799)				(66,759,799)			(66,759,799)
Unrealized securities holding gains				137,704,595				137,704,595			137,704,595
Early Conversion of Convertible Notes		8,945,339					¥ 391,665,502	400,610,841			¥ 400,610,841
Early Conversion of Convertible Notes (in shares) \| shares	846,131					846,131	846,131			(846,131)	(846,131)
Net income / (loss)					242,739,781			242,739,781	(151,117,436)		¥ 91,622,345
Disposal of shares of a subsidiary									(280,075)		(280,075)
Issuance of convertible preferred shares by a subsidiary									186,057,768		186,057,768
Acquisition of a subsidiary									658,466,145		658,466,145
Acquisition of additional shares in subsidiaries	¥ 299	12,413,757						12,414,056	(44,268,537)		(31,854,481)
Acquisition of additional shares in subsidiaries ( in Shares) \| shares	29,864
Balance at Dec. 31, 2014	¥ 3,085,272	4,828,021,816	134,098,747	443,579,376	5,726,024,997	$ (3,323,262)	¥ (1,605,630,913)	9,529,179,295	848,548,293		10,377,727,588
Balance (in shares) at Dec. 31, 2014 \| shares	35,146,982
Changes in shareholders' equity
Issuance of common stock pursuant to share incentive plan	¥ 48,673	207,980,247						208,028,920			¥ 208,028,920
Issuance of common stock pursuant to share incentive plan (in shares) \| shares	777,846
Issuance of ordinary shares for the exercise of stock options (in shares) \| shares										506,163	506,163
Share-based compensation		642,596,474						642,596,474			¥ 642,596,474
Appropriations to statutory reserves			34,842,222		(34,842,222)
Repurchasing common stock							¥ (872,290,891)	(872,290,891)			(872,290,891)
Repurchasing common stock (in shares) \| shares	(498,561)					(498,561)	(498,561)
Foreign currency translation adjustments				(489,917,917)				(489,917,917)			(489,917,917)
Unrealized securities holding gains				606,415,822				606,415,822			606,415,822
Purchasing of Purchased Call Option		(805,504,000)						(805,504,000)			(805,504,000)
Sale of Issued Warrants		523,404,000						523,404,000			523,404,000
Early Conversion of Convertible Notes		13,979,289					¥ 104,994,432	118,973,721			¥ 118,973,721
Early Conversion of Convertible Notes (in shares) \| shares	244,466					244,466	244,466			(244,466)	(244,466)
Net income / (loss)					2,507,655,884			2,507,655,884	(108,260,637)		¥ 2,399,395,247
Disposal of shares of a subsidiary		15,824,133						15,824,133	(747,801,153)		(731,977,020)
Issuance of additional equity stake by subsidiaries									966,486,957		966,486,957
Acquisition of additional shares in subsidiaries		(10,078,392)						(10,078,392)	(36,158,510)		(46,236,902)
Business combination	¥ 985,530	32,540,379,845						32,541,365,375	18,211,383,297		50,752,748,672
Business combination \| shares	15,468,816
Share issuance for the investments	¥ 1,770	35,075,540						35,077,310			35,077,310
Share issuance for the investments \| shares	27,679
Balance at Dec. 31, 2015	¥ 4,121,245	37,991,678,952	168,940,969	560,077,281	8,198,838,659		¥ (2,372,927,372)	44,550,729,734	19,134,198,247		63,684,927,981
Balance (in shares) at Dec. 31, 2015 \| shares	51,167,228					(3,577,357)	(3,577,357)
Changes in shareholders' equity
Issuance of ordinary shares for the exercise of stock options	¥ 52,744	197,628,625						197,681,369			¥ 197,681,369
Issuance of ordinary shares for the exercise of stock options (in shares) \| shares	796,582									368,722	368,722
Share-based compensation		3,559,718,706						3,559,718,706			¥ 3,559,718,706
Appropriations to statutory reserves			68,554,851		(68,554,851)
Foreign currency translation adjustments				(323,581,599)				(323,581,599)		$ (46,605,443)	(323,581,599)
Unrealized securities holding gains				914,529,809				914,529,809		131,719,691	914,529,809
Disposal of available for sale investment				(140,651,759)				(140,651,759)		$ (20,258,067)	(140,651,759)
Early Conversion of Convertible Notes		29,400,802					¥ 137,352,862	166,753,664			¥ 166,753,664
Early Conversion of Convertible Notes (in shares) \| shares	330,048					330,048	330,048			(330,048)	(330,048)
Issuance of ordinary shares for settlement of Convertible Notes	¥ 67,680	2,438,050,267						2,438,117,947		$ 351,162,026	¥ 2,438,117,947
Issuance of ordinary shares for settlement of Convertible Notes (in shares) \| shares	1,044,805
Net income / (loss)					(1,430,703,195)			(1,430,703,195)	(205,527,660)	(235,666,263)	(1,636,230,855)
Disposal of shares of a subsidiary									(3,289,000)		(3,289,000)
Issuance of ordinary shares, net of issuance costs	¥ 295,871	10,652,275,264						10,652,571,135			10,652,571,135
Issuance of ordinary shares, net of issuance costs (in shares) \| shares	4,436,844
Issuance of additional equity stake by subsidiaries									135,359,483		135,359,483
Acquisition of additional shares in subsidiaries	¥ 355,697	8,969,187,969						8,969,543,666	(15,501,696,332)		(6,532,152,666)
Acquisition of additional shares in subsidiaries ( in Shares) \| shares	5,407,787
Business combination	¥ 67,117	1,982,058,116						1,982,125,233	424,873,054		2,406,998,287
Business combination \| shares	972,118
Balance at Dec. 31, 2016	¥ 4,960,354	¥ 65,819,998,701	¥ 237,495,820	¥ 1,010,373,732	¥ 6,699,580,613	$ (3,247,309)	¥ (2,235,574,510)	¥ 71,536,834,710	¥ 3,983,917,792	$ 10,877,250,829	¥ 75,520,752,502
Balance (in shares) at Dec. 31, 2016 \| shares	64,155,412

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
Ordinary shares, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01	$ 0.01

CONSOLIDATED STATEMENTS OF CASH FLOWS	12 Months Ended
CONSOLIDATED STATEMENTS OF CASH FLOWS	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)
Cash flows from operating activities:
Net income/(loss)	$ (235,666,263)	¥ (1,636,230,855)	¥ 2,399,395,247	¥ 91,622,345
Adjustments to reconcile net income to cash provided by operating activities:
Share-based compensation	512,706,136	3,559,718,706	642,596,474	496,643,489
Equity in (income) / loss of affiliates	(86,689,209)	(601,883,179)	135,780,312	(187,191,141)
Gain on deconsolidation of subsidiaries	(36,296)	(252,000)	(2,294,451,702)	(789,193)
Loss from disposal of property, equipment and software	1,277,832	8,871,987	33,986,560	3,751,452
Gain on disposal of cost method investment	(21,470,007)	(149,066,258)
Gain on disposal of available-for-sale investment	(20,258,067)	(140,651,759)
Loss from disposal of a subsidiary				1,529,046
Loss from impairment of long-term investment	6,911,549	47,986,882	0	33,000,000
Provision for doubtful accounts	4,657,874	32,339,617	32,080,786	11,737,580
Depreciation of property, equipment and software	66,454,148	461,391,147	255,966,352	173,786,973
Amortization of intangible assets and land use rights	37,079,731	257,444,573	60,247,658	8,334,028
Deferred income tax expenses/(benefits)	3,381,164	23,475,428	86,464,693	(97,573,997)
Changes in current assets and liabilities, net of assets acquired and liabilities assumed/disposed of in business combinations/dispositions net of deconsolidations:
Increase in accounts receivable	(191,902,211)	(1,332,377,049)	(1,002,531,319)	(261,973,182)
Decrease /(Increase) in due from related parties	(86,648,699)	(601,601,918)	(81,376,345)	2,352,014
(Increase) /Decrease in prepayments and other current assets	85,182,992	591,425,514	(2,224,053,491)	(1,218,273,146)
(Increase)/Decrease in long-term deposits	10,855,727	75,371,314	(381,458,105)	(27,406,657)
Increase in accounts payable	180,220,017	1,251,267,578	2,098,144,678	585,953,759
Increase in due to related parties	84,038,584	583,479,889	236,779,810	6,057,681
Increase in salary and welfare payable	181,352,977	1,259,133,720	271,783,211	259,440,083
Increase /(Decrease) in taxes payable	(112,095,700)	(778,280,444)	281,472,256	23,797,376
Increase in advances from customers	327,090,911	2,270,992,194	2,056,500,006	1,469,414,155
Increase in accrued liability for customer reward program	9,336,578	64,823,864	162,493,908	146,183,973
Increase in other payables and accruals	3,651,384	25,351,540	278,988,927	438,207,218
Net cash provided by operating activities	759,431,152	5,272,730,491	3,048,809,916	1,958,603,856
Cash flows from investing activities:
Purchase of property, equipment and software	(98,348,165)	(682,831,310)	(638,133,430)	(4,788,676,371)
Cash paid for long-term investments	(778,981,919)	(5,408,471,460)	(4,232,366,913)	(2,078,378,807)
Cash paid for business combinations, net of cash acquired	(1,318,938,653)	(9,157,391,070)	4,112,960,205	(130,124,251)
Purchase of intangible assets	(894,520)	(6,210,651)	(20,000,000)	(9,000,000)
(Increase) /Decrease in restricted cash	75,651,774	525,250,267	(760,873,462)	(94,988,241)
Increase in short-term investment	(854,806,205)	(5,934,919,483)	(1,447,586,170)	(2,799,807,028)
Increase in long-term loan receivable			(872,200,000)
Cash repayment from long-term receivables	30,565,748	212,217,989	872,200,000	496,368,000
Cash advance received from planned disposal of equity investment	2,544,313	17,665,162
Cash received from disposal of cost method investments	45,679,830	317,155,061
Cash received from disposal of available-for-sale investment	55,075,256	382,387,499	61,980,000
Cash received/(used) from deconsolidation of a subsidiary, net of cash disposed	(13,010,370)	(90,331,000)	(1,502,561,561)	45,569,216
Cash used from disposal of a subsidiary net of cash disposed				(7,373,416)
Net cash used in investing activities	(2,855,462,911)	(19,825,478,996)	(4,426,581,331)	(9,366,410,898)
Cash flows from financing activities:
Proceeds from short-term bank loans	285,160,450	1,979,869,005	644,411,544	2,325,694,972
Proceeds from long-term bank loans	367,276,393	2,550,000,000
Proceeds from exercise of share options	30,494,058	211,720,242	52,117,597	184,579,173
Repurchase of ordinary shares			(872,290,891)	(446,155,147)
Cash paid for acquisition of additional equity stake in subsidiaries	(940,825,676)	(6,532,152,666)	(46,236,902)	(36,792,354)
Cash paid for settlement of convertible notes	(292,952,246)	(2,033,967,447)
Cash received from non-controlling investors	12,474,360	86,609,482	275,972,483	139,393,178
Proceeds from issuance of convertible preferred shares by a subsidiary			725,512,513	186,475,640
Proceeds from issuance of senior convertible notes, net of issuance costs	942,671,185	6,544,966,036	14,736,200,000	3,069,000,000
Proceeds from sale of warrants			523,404,000
Purchase of Purchased Call Option			(805,504,000)
Proceeds from issuance of ordinary shares, net of issuance costs	1,534,289,376	10,652,571,135
Repayment of loans due to related parties	(262,265,810)	(1,820,911,519)
Proceeds from repayment of loans due from related parties	93,771,193	651,053,394
Net cash provided by financing activities	1,770,093,283	12,289,757,662	15,233,586,344	5,422,195,462
Effect of foreign exchange rate changes on cash and cash equivalents	213,452,026	1,481,997,420	58,971,946	148,154,565
Net (decrease)/increase in cash and cash equivalents	(112,486,450)	(780,993,423)	13,914,786,875	(1,837,457,015)
Cash and cash equivalents, beginning of year	2,767,632,821	19,215,674,674	5,300,887,799	7,138,344,814
Cash and cash equivalents, end of year	2,655,146,371	18,434,681,251	19,215,674,674	5,300,887,799
Supplemental disclosure of cash flow information
Cash paid during the year for income taxes	59,306,754	411,766,790	243,828,898	261,734,551
Cash paid for interest, net of amounts capitalized	85,488,515	593,546,761	242,114,200	31,144,846
Supplemental schedule of non-cash investing and financing activities
Conversion of convertible senior notes	24,017,523	166,753,664	118,973,720	400,610,842
Issuance of ordinary shares for settlement of Convertible Notes	351,162,026	2,438,117,947
Non-cash consideration paid for business acquisitions, investments and non-controlling interests	(2,106,570,864)	(14,625,921,507)	(32,590,874,841)	(169,784,697)
Share exchange for equity investment (Note 8)	(359,896,764)	(2,498,763,234)
Accruals related to purchase of property, equipment and software	(3,291,928)	(22,855,856)	(48,486,734)	(258,632,797)
Share issuance for the investments			(35,077,310)
Unpaid cash consideration for business acquisitions and investments (Note 2)	$ (71,645,458)	¥ (497,434,415)	¥ (110,302,844)	¥ (306,966,884)

ORGANIZATION AND NATURE OF OPERATIONS	12 Months Ended
ORGANIZATION AND NATURE OF OPERATIONS	Dec. 31, 2016
ORGANIZATION AND NATURE OF OPERATIONS
ORGANIZATION AND NATURE OF OPERATIONS	1. ORGANIZATION AND NATURE OF OPERATIONS The accompanying consolidated financial statements include the financial statements of Ctrip.com International, Ltd. (the “Company”), its subsidiaries, VIEs and VIEs’ subsidiaries. The Company, its subsidiaries, the consolidated VIEs and their subsidiaries are collectively referred to as the “Group”. The Group is principally engaged in the provision of travel related services including accommodation reservation, transportation ticketing, packaged-tour, corporate travel management services, as well as, to a much lesser extent, Internet-related advertising and other related services.

PRINCIPAL ACCOUNTING POLICIES

12 Months Ended

Dec. 31, 2016

PRINCIPAL ACCOUNTING POLICIES

PRINCIPAL ACCOUNTING POLICIES

2. PRINCIPAL ACCOUNTING POLICIES

Basis of presentation

The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“US GAAP”).

The preparation of financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities at the balance sheet dates and the reported amounts of revenues and expenses during the reporting periods. Actual results could materially differ from those estimates.

Consolidation

The consolidated financial statements include the financial statements of the Company, its subsidiaries, VIEs and VIEs’ subsidiaries. All significant transactions and balances between the Company, its subsidiaries, VIEs and VIEs’ subsidiaries have been eliminated upon consolidation.

A subsidiary is an entity in which the Company, directly or indirectly, controls more than one half of the voting power; has the power to appoint or remove the majority of the members of the board of directors; to cast a majority of votes at the meeting of the board of directors or to govern the financial and operating policies of the investee under a statute or agreement among the shareholders or equity holders.

The Company applies the guidance codified in Accounting Standard Codification 810, Consolidations (“ASC 810”) on accounting for VIEs and their respective subsidiaries, which requires certain variable interest entities to be consolidated by the primary beneficiary of the entity in which it has a controlling financial interest. A VIE is an entity with one or more of the following characteristics: (a) the total equity investment at risk is not sufficient to permit the entity to finance its activities without additional financial support; (b) as a group, the holders of the equity investment at risk lack the ability to make certain decisions, the obligation to absorb expected losses or the right to receive expected residual returns, or (c) an equity investor has voting rights that are disproportionate to its economic interest and substantially all of the entity’s activities are on behalf of the investor. Accordingly, the financial statements of the following VIEs and VIEs’ subsidiaries are consolidated into the Company’s financial statements since July 1, 2003 or their respective date of establishment/acquisition, whichever is later:

The following is a summary of the Company’s major VIEs and VIEs’ subsidiaries:

Name of VIE and VIEs’ subsidiaries		Date of establishment/acquisition

Shanghai Ctrip Commerce Co., Ltd. (“Shanghai Ctrip Commerce”)		Established on July 18, 2000
Beijing Ctrip International Travel Agency Co., Ltd. (“Beijing Ctrip”)		Acquired on January 15, 2002
Guangzhou Ctrip International Travel Agency Co., Ltd. (“Guangzhou Ctrip”)		Established on April 28, 2003
Shanghai Ctrip International Travel Agency Co., Ltd. (“Shanghai Ctrip”, formerly known as Shanghai Ctrip Charming International Travel Agency Co., Ltd.)		Acquired on September 23, 2003
Shenzhen Ctrip Travel Agency Co., Ltd. (“Shenzhen Ctrip”)		Established on April 13, 2004
Ctrip Insurance Agency Co., Ltd. (“Ctrip Insurance”)		Established on July 25, 2011
Shanghai Huacheng Southwest International Travel Agency Co., Ltd. (“Shanghai Huacheng”, formerly known as Shanghai Huacheng Southwest Travel Agency Co., Ltd.)		Established on March 13, 2001
Chengdu Ctrip Travel Agency Co., Ltd. (“Chengdu Ctrip”)		Established on January 8, 2007
Chengdu Ctrip International Travel Agency Co., Ltd. (“Chengdu Ctrip International”)		Established on November 4, 2008
Beijing Qu Na Information Technology Company Limited (“Qunar Beijing”)		Established on March 17, 2006

For the years ended December 31, 2014, 2015 and 2016, the Company is considered the primary beneficiary of a VIE or VIEs’ subsidiary and consolidated the VIE or VIEs’ subsidiary if the Company had variable interests, that will absorb the entity’s expected losses, receive the entity’s expected residual returns, or both.

Major variable interest entities and their subsidiaries

The Company conducts a part of its operations through a series of agreements with certain VIEs and VIEs’ subsidiaries as stated in above. These VIEs and VIEs’ subsidiaries are used solely to facilitate the Group’s participation in Internet content provision, advertising business, travel agency and air-ticketing services in the People’s Republic of China (“PRC”) where foreign ownership is restricted.

Shanghai Ctrip Commerce is a domestic company incorporated in Shanghai, the PRC. Shanghai Ctrip Commerce holds a value-added telecommunications business license and is primarily engaged in the provision of advertising business on the Internet website. Two senior officers of the Company collectively hold 100% of the equity interest in Shanghai Ctrip Commerce. The registered capital of Shanghai Ctrip Commerce was RMB30,000,000 as of December 31, 2016.

Beijing Ctrip is a domestic company incorporated in Beijing, the PRC. Beijing Ctrip holds an air transport sales agency license, domestic and cross-border travel agency license and is mainly engaged in the provision of air-ticketing services and packaged tour services. Shanghai Ctrip holds 100% of the equity interest in Beijing Ctrip. The registered capital of Beijing Ctrip was RMB40,000,000 as of December 31, 2016.

Guangzhou Ctrip is a domestic company incorporated in Guangzhou, the PRC. Guangzhou Ctrip holds air transport sales agency license, domestic and cross-border travel agency license and is mainly engaged in the provision of air-ticketing services and packaged tour services. Two senior officers of the Company collectively hold 100% of the equity interest in Guangzhou Ctrip. The registered capital of Guangzhou Ctrip was RMB3,000,000 as of December 31, 2016.

Shanghai Ctrip is a domestic company incorporated in Shanghai, the PRC. Shanghai Ctrip holds domestic and cross-border travel agency licenses, air transport sales agency license and mainly provides domestic and cross-border tour services. In September 2012, the Company purchased the ownership interests from the unrelated minority shareholder and effected a simultaneous reduction of capital of Shanghai Ctrip. Upon completion of the above transactions, two senior officers of the Company hold 100% of the equity interest in Shanghai Ctrip. The registered capital of Shanghai Ctrip was RMB10,050,000 as of December 31, 2016.

Shenzhen Ctrip is a domestic company incorporated in Shenzhen, the PRC. Shenzhen Ctrip holds air transport sales agency license and domestic travel agency license and is engaged in the provision of air-ticketing service. Two senior officers of the Company collectively hold 100% of the equity interest in Shenzhen Ctrip. The registered capital of Shenzhen Ctrip was RMB2,500,000 as of December 31, 2016.

Ctrip Insurance is an insurance agency incorporated in Shanghai, the PRC. Ctrip Insurance holds an insurance agency business license. Shanghai Ctrip Commerce and Ctrip Computer Technology (Shanghai) Co., Ltd. (“Ctrip Computer Technology”) hold 100% of the equity interest in Ctrip Insurance. The registered capital of Ctrip Insurance was RMB50,000,000 as of December 31, 2016.

Shanghai Huacheng is a domestic company incorporated in Shanghai, the PRC. Shanghai Huacheng holds a domestic travel agency license and an air transport sales agency license and mainly provides domestic tour services and air-ticketing services. Shanghai Ctrip Commerce holds 100% of the equity interest in Shanghai Huacheng. The registered capital of Shanghai Huacheng was RMB100,000,000 as of December 31, 2016.

Chengdu Ctrip is a domestic company incorporated in Chengdu, the PRC. Chengdu Ctrip holds air transport sales agency license and domestic travel agency license and is engaged in the provision of air-ticketing service. Two senior officers of the Company holds 100% of the equity interest in Chengdu Ctrip. The registered capital of Chengdu Ctrip was RMB20,000,000 as of December 31, 2016.

Chengdu Ctrip International is a domestic company incorporated in Chengdu, the PRC. Chengdu Ctrip International holds domestic and cross-border travel agency licenses, air transport sales agency license and mainly provides domestic and cross-border tour services. Shanghai Ctrip holds 100% of the equity interest in Chengdu Ctrip International. The registered capital of Chengdu Ctrip International was RMB2,000,000 as of December 31, 2016.

Qunar Beijing is a domestic company incorporated in Beijing, the PRC. Qunar Beijing holds various domestic and cross-border business licenses of Qunar. Two senior officers of the Company holds 100% of the equity interest in Qunar Beijing. The registered capital of Qunar Beijing was RMB11,000,000 as of December 31, 2016.

The capital injected by senior officers or senior officer’s family member are funded by the Company and are recorded as long-term business loans to related parties. The Company does not have any ownership interest in these VIEs and VIEs’ subsidiaries.

As of December 31, 2016, the Company has various agreements with its consolidated VIEs and VIEs’ subsidiaries, including loan agreements, exclusive technical consulting and services agreements, share pledge agreements, exclusive option agreements and other operating agreements.

Details of certain key agreements with the VIEs are as follows:

Powers of Attorney: Each of the shareholders of our consolidated affiliated Chinese entities, except for Hui Cao and Hui Wang, signed an irrevocable power of attorney to appoint Ctrip Travel Network, Ctrip Travel Information or Wancheng, as attorney-in-fact to vote, by itself or any other person to be designated at its discretion, on all matters of the applicable consolidated affiliated Chinese entities. Each such power of attorney will remain effective as long as the applicable consolidated affiliated Chinese entity exists, and such shareholders of the applicable consolidated affiliated Chinese entities are not entitled to terminate or amend the terms of the power of attorneys without prior written consent from us.

As of the date of these consolidated financial statements, each of the shareholders of Qunar Beijing, Hui Cao and Hui Wang, also signed an irrevocable power of attorney authorizing an appointee of Beijing Qunar Software Technology Company Limited, or Qunar Software, to exercise, in a manner approved by Qunar, on such shareholder’s behalf the full shareholder rights pursuant to applicable laws and Qunar Beijing’s articles of association, including without limitation full voting rights and the right to sell or transfer any or all of such shareholder’s equity interest in Qunar Beijing. Each such power of attorney is effective until such time as such relevant shareholder ceases to hold any equity interest in Qunar Beijing. The terms of the power of attorney with respect to Qunar Beijing are otherwise substantially similar to the terms described in the foregoing paragraph.

Technical Consulting and Services Agreements: Ctrip Travel Information, Ctrip Travel Network and Wancheng, each a wholly owned PRC subsidiary of ours, provide our consolidated affiliated Chinese entities except for Qunar Beijing, with technical consulting and related services and staff training and information services on an exclusive basis. We also maintain their network platforms. In consideration for our services, our consolidated affiliated Chinese entities agree to pay us service fees as calculated in such manner as determined by us from time to time based on the nature of service, which may be adjusted periodically. For 2016, our consolidated affiliated Chinese entities paid Ctrip Computer Technology (before our restructuring of business lines and restatement of contractual arrangements in 2015) or Ctrip Travel Information (after our restructuring of business lines and restatement of contractual arrangements in 2015) and Ctrip Travel Network a quarterly fee based on the number of transportation tickets sold and the number of packaged-tour products sold in the quarter, at an average rate from RMB5 (US$0.7) to RMB16 (US$2.3) per ticket and from RMB36 (US$5.2) to RMB295 (US$42.5) per person per tour. Although the service fees are typically determined based on the number of transportation tickets sold and packaged tour products sold, given the fact that the nominee shareholders of such consolidated affiliated Chinese entities have irrevocably appointed the employees of our subsidiaries to vote on their behalf on all matters they are entitled to vote on, we have the right to determine the level of service fees paid and therefore receive substantially all of the economic benefits of our consolidated affiliated Chinese entities in the form of service fees. Ctrip Travel Information, Ctrip Travel Network or Wancheng, as appropriate, will exclusively own any intellectual property rights arising from the performance of this agreement. The initial term of these agreements is 10 years and may be renewed automatically in 10-year terms unless we disapprove the extension. We retain the exclusive right to terminate the agreements at any time by delivering a 30-day advance written notice to the applicable consolidated affiliate Chinese entity.

As of the date of these consolidated financial statements, pursuant to the restated exclusive technical consulting and services agreement between Qunar Beijing and Qunar Software, Qunar Software provides Qunar Beijing with technical, marketing and management consulting services on an exclusive basis in exchange for service fee paid by Qunar Beijing based on a set formula defined in the agreement subject to adjustment by Qunar Software at its sole discretion. This agreement will remain in effect until terminated unilaterally by Qunar Software or mutually. The terms of this agreement are otherwise substantially similar to the terms described in the foregoing paragraph.

Share Pledge Agreements: The shareholders of our consolidated affiliated Chinese entities, except for Hui Cao and Hui Wang, have pledged their respective equity interests in the applicable consolidated affiliated Chinese entities as a guarantee for the performance of all the obligations under the other contractual arrangements, including payment by such consolidated affiliated Chinese entities of the technical and consulting services fees to us under the technical consulting and services agreements, repayment of the business loan under the loan agreements and performance of obligations under the exclusive option agreements, each agreement as described herein. In the event any of such consolidated affiliated Chinese entity breaches any of its obligations or any shareholder of such consolidated affiliated Chinese entities breaches his or her obligations, as the case may be, under these agreements, we are entitled to enforce the equity pledge right and sell or otherwise dispose of the pledged equity interests after the pledge is registered with the relevant local branch of SAIC, and retain the proceeds from such sale or require any of them to transfer his or her equity interest without consideration to the PRC citizen(s) designated by us. These share pledge agreements are effective until two years after the pledgor and the applicable consolidated affiliated Chinese entities no longer undertake any obligations under the above-referenced agreements.

As of the date of these consolidated financial statements, pursuant to the equity interest pledge agreement among Qunar Software, Hui Cao and Hui Wang, Hui Cao and Hui Wang have pledged their equity interests in Qunar Beijing along with all rights, titles and interests to Qunar Software as guarantee for the performance of all obligations under the relevant contractual arrangements mentioned herein. After the pledge is registered with the relevant local branch of SAIC, Qunar Software may enforce this pledge upon the occurrence of a settlement event or as required by the PRC law. The pledge, along with this agreement, will be effective upon registration with the local branch of the SAIC, and will expire when all obligations under the relevant contractual arrangements have been satisfied or when each of Hui Cao and Hui Wang completes a transfer of equity interest and ceases to hold any equity interest in Qunar Beijing. In enforcing the pledge, Qunar Software is entitled to dispose of the pledge and have priority in receiving payment from proceeds from the auction or sale of all or part of the pledge until the obligations are settled. The terms of this agreement are otherwise substantially similar to the terms described in the foregoing paragraph.

Loan Agreements: Under the loan agreements we entered into with the shareholders of our consolidated affiliated Chinese entities, except for Hui Cao and Hui Wang, we extended long-term business loans to these shareholders of our consolidated affiliated Chinese entities with the sole purpose of providing funds necessary for the capitalization or acquisition of such consolidated affiliated Chinese entities. These business loan amounts were injected into the applicable consolidated affiliated Chinese entities as capital and cannot be accessed for any personal uses. The loan agreements shall remain effective until the parties have fully performed their respective obligations under the agreement, and the shareholders of such consolidated affiliated Chinese entities have no right to unilaterally terminate these agreements. In the event that the PRC government lifts its substantial restrictions on foreign ownership of the air-ticketing, travel agency, or value-added telecommunications business in China, as applicable, we will exercise our exclusive option to purchase all of the outstanding equity interests of our consolidated affiliated Chinese entities, as described in the following paragraph, and the loan agreements will be cancelled in connection with such purchase. However, it is uncertain when, if at all, the PRC government will lift any or all of these restrictions.

As of the date of these consolidated financial statements, pursuant to the loan agreement among Qunar Software, Hui Cao and Hui Wang, the loans extended by Qunar Software to each of Hui Cao and Hui Wang are only repayable by a transfer of such borrower’s equity interest in Qunar Beijing to Qunar Software or its designated party, in proportion to the amount of the loan to be repaid. This loan agreement will continue in effect indefinitely until such time when (i) the borrowers receive a repayment notice from Qunar Software and fully repay the loans, or (ii) an event of default (as defined therein) occurs unless Qunar Software sends a notice indicating otherwise within 15 calendar days after it is aware of such event. The terms of this loan agreement is otherwise substantially similar to the terms described in the foregoing paragraphs.

Exclusive Option Agreements: As consideration for our entering into the loan agreements described above, each of the shareholders of our consolidated affiliated Chinese entities, except for Hui Cao and Hui Wang, has granted us an exclusive, irrevocable option to purchase, or designate one or more person(s) at our discretion to purchase, all of their equity interests in the applicable consolidated affiliated Chinese entities at any time we desire, subject to compliance with the applicable PRC laws and regulations. We may exercise the option by issuing a written notice to the relevant consolidated affiliated Chinese entity. The purchase price shall be equal to the contribution actually made by the shareholder for the relevant equity interest. Therefore, if we exercise these options, we may choose to cancel the outstanding loans we extended to the shareholders of such consolidated affiliated Chinese entities pursuant to the loan agreements as the loans were used solely for equity contribution purposes. The initial term of these agreements is 10 years and may be renewed automatically in 10-year terms unless we disapprove the extension. We retain the exclusive right to terminate the agreements at any time by delivering a written notice to the applicable consolidated affiliate Chinese entity.

Hui Cao and Hui Wang also entered into the equity option agreement with Qunar, Qunar Software and Qunar Beijing. These equity option agreements contain arrangements that are similar to that as described in the foregoing paragraph. This agreement will remain effective with respect to each of Qunar Beijing’s shareholders until all of the equity interest has been transferred or Qunar and Qunar Software terminates the agreement unilaterally with 30 days’ prior written notice.

Our consolidated affiliated Chinese entities and their shareholders agree not to enter into any transaction that would affect the assets, obligations, rights or operations of our consolidated affiliated Chinese entities without our prior written consent. They also agree to accept our guidance with respect to day-to-day operations, financial management systems and the appointment and dismissal of key employees.

In addition, we also enter into technical consulting and services agreements with our majority or wholly owned subsidiaries of some of the consolidated affiliated Chinese entities, such as Chengdu Ctrip International, and these subsidiaries pay us service fees based on the level of services provided. The existence of such technical consulting and services agreements provides us with the enhanced ability to transfer economic benefits of these majority or wholly owned subsidiaries of the consolidated affiliated Chinese entities to us in exchange for the services provided, and this is in addition to our existing ability to consolidate and extract the economic benefits of these majority or wholly owned subsidiaries of the consolidated affiliated Chinese entities. For instance, the consolidated affiliated Chinese entities may cause the economic benefits to be channeled to them in the form of dividends, which then may be further consolidated and absorbed by us through the contractual arrangements described above.

Risks in relation to contractual arrangements between the Company’s PRC subsidiaries and its affiliated Chinese entities:

The Company has been advised by Commerce & Finance Law Offices, its PRC legal counsel, that its contractual arrangements with its consolidated VIEs as described in the Company’s annual report are valid, binding and enforceable under the current laws and regulations of China. Based on such legal opinion and the management’s knowledge and experience, the Company believes that its contractual arrangements with its consolidated VIEs are in compliance with current PRC laws and legally enforceable. However, there may be in the event that the affiliated Chinese entities and their respective shareholders fail to perform their contractual obligations, the Company may have to rely on the PRC legal system to enforce its rights. The PRC legal system is based on written statutes. Prior court decisions may be cited for reference but have limited precedential value. Since 1979, PRC legislation and regulations have significantly enhanced the protections afforded to various forms of foreign investments in China. However, since the PRC legal system is still evolving, the interpretations of many laws, regulations and rules are not always uniform and enforcement of these laws, regulations and rules involve uncertainties, which may limit remedies available to us. In addition, any litigation in China may be protracted and result in substantial costs and diversion of resources and management attention. Due to the uncertainties with respect to the PRC legal system, the PRC government authorities may ultimately take a view contrary to the opinion of its PRC legal counsel with respect to the enforceability of the contractual arrangements.

There are, however, substantial uncertainties regarding the interpretation and application of current or future PRC laws and regulations. Accordingly, the Company cannot be assured that the PRC government authorities will not ultimately take a view that is contrary to the Company’s belief and the opinion of its PRC legal counsel. On January 19, 2015, the Ministry of Commerce of the PRC, or (the “MOFCOM”) released for public comments a proposed PRC law (the “Draft FIE Law”) which includes VIEs within the scope of entities that could be considered to be foreign invested enterprises (or “FIEs”) and may be subject to restrictions under existing PRC law on foreign investment in certain categories of industries. Specifically, the Draft FIE Law introduces the concept of “actual control” for determining whether an entity is considered to be an FIE. In addition to control through direct or indirect ownership on equity, the Draft FIE Law includes control through contractual arrangements within the definition of “actual control.” If the Draft FIE Law is passed by the People’s Congress of the PRC and goes into effect in its current form, these provisions regarding control through contractual arrangements could be construed to reach the Company’s VIE arrangements, and as a result the Company’s VIEs could become explicitly subject to the current restrictions on foreign investment in certain categories of industry. The Draft FIE Law includes provisions that would exempt from the definition of FIEs where the ultimate controlling shareholders are either entities organized under PRC law or individuals who are PRC citizens. The Draft FIE Law is silent as to what type of enforcement action might be taken against existing VIEs that operate in restricted or prohibited industries and are not controlled by entities organized under PRC law or individuals who are PRC citizens. If the contractual arrangements establishing the Company’s VIE structure are found to be in violation of any existing law and regulations or future PRC laws and regulations or under the Draft FIE Law if it becomes effective, the relevant PRC government authorities will have broad discretion in dealing with such violation, including, without limitation, levying fines, confiscating our income or the income of our affiliated Chinese entities, revoking our business licenses or the business licenses of our affiliated Chinese entities, requiring us and our affiliated Chinese entities to restructure our ownership structure or operations and requiring us or our affiliated Chinese entities to discontinue any portion or all of our value-added telecommunications, air-ticketing, travel agency or advertising businesses. Any of these actions could cause significant disruption to the Company’s business operations, and have a severe adverse impact on the Company’s cash flows, financial position and operating performance. If the imposing of these penalties cause the Company to lose its rights to direct the activities of and receive economic benefits from its VIEs, which in turn may restrict the Company’s ability to consolidate and reflect in its financial statements the financial position and results of operations of its VIEs.

Summary financial information of the Group’s VIEs in the consolidated financial statements

Pursuant to the contractual arrangements with the VIEs, the Company has the power to direct activities of the VIEs, and can have assets transferred freely out of the VIEs without any restrictions. Therefore the Company considers that there is no asset of a consolidated VIE that can be used only to settle obligations of the VIE, except for registered capital and PRC statutory reserves of the VIEs amounting to a total of RMB590 million as of December 31, 2016. As all the consolidated VIEs are incorporated as limited liability companies under the PRC Company Law, creditors of the VIEs do not have recourse to the general credit of the Company for any of the liabilities of the consolidated VIEs.

Summary financial information of the VIEs, which represents aggregated financial information of the VIEs and their respective subsidiaries included in the accompanying consolidated financial statements, is as follows:

	As of December 31,
	2015		2016
	RMB		RMB
Total assets	22,188,424,951		30,544,580,876
Less: Inter-company receivables	(3,808,937,898	)	(2,050,819,348	)
Total assets excluding inter-company	18,379,487,053		28,493,761,528
Total liabilities	20,998,061,568		29,101,732,239
Less: Inter-company payables	(8,572,648,210	)	(15,904,065,265	)
Total liabilities excluding inter-company	12,425,413,358		13,197,666,974

As of December 31, 2015 and 2016, the VIEs’ assets mainly consisted of cash and cash equivalent (December 31, 2015: RMB2.8 billion, December 31, 2016: RMB10.0 billion), short-term investment (December 31, 2015: RMB3.1 billion, December 31, 2016: RMB6.5 billion), accounts receivables (December 31, 2015: RMB2.7 billion, December 31, 2016: RMB3.9 billion), prepayments and other current assets (December 31, 2015: RMB4.1 billion, December 31, 2016: RMB3.5 billion) and investments (non-current) (December 31, 2015: RMB2.4 billion, December 31, 2016: RMB2.8 billion). The inter-company receivables of RMB3.8 billion and RMB2.1 billion as of December 31, 2015 and 2016 mainly represented the cash paid by a VIE to one of the Company’s WFOEs for treasury cash management purpose.

As of December 31, 2015 and 2016, the VIEs’ liabilities mainly consisted of advance from customers (December 31, 2015: RMB5.1 billion , December 31, 2016: RMB5.0 billion), accounts payable (December 31, 2015: RMB4.0 billion, December 31, 2016: RMB4.3 billion), other payables and accruals (December 31, 2015: RMB2.1 billion, December 31, 2016: RMB1.3 billion) and short-term debt (December 31, 2015: RMB164 million , December 31, 2016: RMB1.2 billion), . The inter-company payables as of December 31, 2015 and 2016 were RMB8.6 billion and RMB15.9 billion, respectively, which primarily consisted of the payables due to Ctrip.com (Hong Kong) Limited (“Ctrip HK”), one of the Company’s wholly-owned subsidiaries, for its payment of overseas air tickets and tour packages on behalf of a VIE and another VIEs’ subsidiary and the service fees payable to the WFOEs under the technical consulting and services agreements, which are operational in nature from the VIEs and their subsidiaries’ perspectives.

The following table set forth the summary of results of operations of the VIEs and their subsidiaries of the Company:

	For the year ended December 31,
	2014		2015		2016
	RMB		RMB		RMB
Net revenues	4,138,380,618		6,384,556,234		8,706,139,377
Cost of revenues	1,252,538,920		1,983,511,461		2,442,997,433
Net income / (loss)	(87,193,139	)	(73,523,163	)	100,653,423

As aforementioned, the VIEs mainly conduct air-ticketing, travel agency, advertising and value-added telecommunication businesses. Revenues from VIEs accounted for around 45% of the Company’s total revenues in 2016. The air-ticketing and packaged-tour revenues continued to increase in 2016, primarily driven by the increase in the air-ticketing volume and leisure travel volume.

The VIEs’ net income before the deduction of the inter-company consulting fee charges were RMB1.1 billion, RMB1.0 billion and RMB2.8 billion for the years ended December 31, 2014, 2015 and 2016, respectively.

The WFOEs are the sole and exclusive provider of technical consulting and related services and information services for the VIEs. Pursuant to the Exclusive Technical Consulting and Service Agreements, the VIEs pay service fees to the WFOEs based on the VIEs’ actual operating results. The WFOEs are entitled to receive substantially all of the net income and transfer a majority of the economic benefits in the form of service fees from the VIEs and VIEs’ subsidiaries to the WFOEs. For remaining undistributed retained earnings, tax planning strategies are in place to support their enterprise income tax free treatment.

The amount of service fees paid by all the VIEs as a percentage of the VIEs’ total net income were 109.4%, 107.1% and 96.3% for the years ended December 31, 2014, 2015 and 2016, respectively.

The following tables set forth the summary of cash flow activities of the VIEs and their subsidiaries of the Company:

	For the year ended December 31,
	2014	2015	2016
	RMB	RMB	RMB
Net cash provided by operating activities	1,052,138,839	160,298,446	7,190,925,721
Net cash used in investing activities	—	—	—
Net cash provided by financing activities	—	—	—

Currently there is no contractual arrangement that could require the Company to provide additional financial support to the consolidated VIEs. As the Company is conducting certain business in the PRC mainly through the VIEs, the Company may provide such support on a discretionary basis in the future, which could expose the Company to a loss.

Foreign currencies

The Group’s reporting currency is RMB. The Company’s functional currency is US$. The Company’s operations are conducted through the subsidiaries and VIEs where the local currency is the functional currency and the financial statements of those subsidiaries are translated from their respective functional currencies into RMB.

Transactions denominated in currencies other than functional currencies are translated at the exchange rates quoted by the People’s Bank of China (the “PBOC”), the Hong Kong Association of Banks (the “HKAB”) or major Taiwan banks, prevailing or averaged at the dates of the transaction for PRC and Hong Kong subsidiaries and ezTravel, a Taiwan subsidiary respectively. Gains and losses resulting from foreign currency transactions are included in the consolidated statements of income and comprehensive income. Monetary assets and liabilities denominated in foreign currencies are translated using the applicable exchange rates quoted by the PBOC, HKAB or banks located in Taiwan at the balance sheet dates. All such exchange gains and losses are included in the statements of income.

Assets and liabilities of the group companies are translated from their respective functional currencies to the reporting currency at the exchange rates at the balance sheet dates, equity accounts are translated at historical exchange rates and revenues and expenses are translated at the average exchange rates in effect during the reporting period. The exchange differences for the translation of group companies with non-RMB functional currency into the RMB functional currency are included in foreign currency translation adjustments, which is a separate component of shareholders’ equity on the consolidated financial statements.

Translations of amounts from RMB into US$ are solely for the convenience of the reader and were calculated at the rate of US$1.00 = RMB6.943 on December 30, 2016, representing the certificated exchange rate published by the Federal Reserve Board. No representation is intended to imply that the RMB amounts could have been, or could be, converted, realized or settled into US$ at that rate on December 31, 2016, or at any other rate.

Cash and cash equivalents

Cash includes currency on hand and deposits held by financial institutions that can be added to or withdrawn without limitation. Cash equivalents represent short-term, highly liquid investments that are readily convertible to known amounts of cash and with original maturities from the date of purchase of generally three months or less.

Restricted cash

Restricted cash represents cash that cannot be withdrawn without the permission of third parties. The Group’s restricted cash is substantially cash balance on deposit required by its business partners and commercial banks.

Short-term investments

Short-term investments represent the investments issued by commercial banks or other financial institutions with a variable interest rate indexed to the performance of underlying assets within one year. The Company elected the fair value method at the date of initial recognition and carried these investments subsequently at fair value. Changes in the fair value are reflected in the consolidated statements of income and comprehensive income.

Long term loan receivable

Long-term loan receivables are recorded at cost and compounded accrued interests as we do not intend to sell the security, or it is more likely than not that the Company will not be required to sell the security before full recovery of our cost. The Company evaluates the qualitative criteria to determine whether we expect to recover our cost.

Land use rights

Land use rights represent the prepayments for usage of the parcels of land where the office buildings are located, are recorded at cost, and are amortized over their respective lease periods (usually over 40 to 50 years).

Property, equipment and software

Property, equipment and software are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are computed using the straight-line method over the following estimated useful lives, taking into account any estimated residual value:

Building		20-40 years
Leasehold improvements		Lesser of the term of the lease or the estimated useful lives of the assets
Website-related equipment		5 years
Computer equipment		3-5 years
Furniture and fixtures		3-5 years
Software		3-5 years

The Company recognizes the disposal of Property, equipment and software in general and administrative expenses.

Investments

The Company’s investments include cost method investments, equity method investments, held to maturity investments and available-for-sale investments in certain publicly traded companies and privately-held companies.

The Company applies equity method in accounting for its investments in entities in which the Company has the ability to exercise significant influence but does not own a majority of equity interest or which the Company otherwise controls and the investments are in either common stock or in-substance common stock. Unrealized gains on transactions between the Company and an affiliated entity are eliminated to the extent of the Company’s interest in the affiliated entity unrealized losses are also eliminated unless the transaction provides evidence of an impairment of the asset transferred.

The Company classifies its investments in debt and equity securities, that are not accounted for as equity method investments, into one of three categories and accounts for these as follows: (i) debt securities that the Company has the positive intent and the ability to hold to maturity are classified as “held-to-maturity” and reported at amortized cost; (ii) debt and equity securities that are bought and held principally for the purpose of selling them in the near term are classified as “trading securities” with unrealized holding gains and losses reported in earnings; (iii) debt and equity securities not classified as held to maturity or as trading securities are classified as “available-for-sale.” The available-for-sale debt securities are measured at fair value. The available-for-sale equity securities with readily determinable fair value are also measured at fair value. The changes in the fair values for available-for-sale securities measured at fair values are reported through other comprehensive income. Realized gains or losses are charged to earnings during the period in which the gains or losses are realized. The available-for-sale equity securities without readily determinable fair value are measured at cost. Gain or losses are realized when such investments are sold or when dividends are declared or payments are received or when impaired.

Fair value measurement of financial instruments

Financial assets and liabilities of the Group primarily comprise of cash and cash equivalents, restricted cash, time deposits, financial products, accounts receivable, due from related parties, available-for-sale investments, accounts payable, due to related parties, advances from end users, short-term bank borrowings, other short-term liabilities and long-term debts. As of December 31, 2015 and 2016, the Company does not hold any derivative instruments, and except for long-term debts and available-for-sale investments, carrying values of these financial instruments approximated their fair values because of their generally short maturities. The Company reports available-for-sale investments at fair value at each balance sheet date and changes in fair value are reflected in the statements of income and comprehensive income. The Company disclosed the fair value of its long-term debts based on Level 2 inputs in Note 17.

The Company measures its financial assets and liabilities using inputs from the following three levels of the fair value hierarchy. The three levels are as follows:

Level 1 inputs are unadjusted quoted prices in active markets for identical assets that the management has the ability to access at the measurement date.

Level 2 inputs include quoted prices for similar assets in active markets, quoted prices for identical or similar assets in markets that are not active, inputs other than quoted prices that are observable for the asset (i.e., interest rates, yield curves, etc.), and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs).

Level 3 includes unobservable inputs that reflect the management’s assumptions about the assumptions that market participants would use in pricing the asset. The management develops these inputs based on the best information available, including the own data.

Business combination

U.S. GAAP requires that all business combinations not involving entities or businesses under common control be accounted for under the acquisition method. The Group applies ASC 805, “Business combinations”, the cost of an acquisition is measured as the aggregate of the fair values at the date of exchange of the assets given, liabilities incurred, and equity instruments issued. The costs directly attributable to the acquisition are expensed as incurred. Identifiable assets, liabilities and contingent liabilities acquired or assumed are measured separately at their fair value as of the acquisition date, irrespective of the extent of any non-controlling interests. The excess of the (i) the total of cost of acquisition, fair value of the non-controlling interests and acquisition date fair value of any previously held equity interest in the acquiree over (ii) the fair value of the identifiable net assets of the acquiree is recorded as goodwill. If the cost of acquisition is less than the fair value of the net assets of the subsidiary acquired, the difference is recognized directly in the consolidated statements of income and comprehensive income.

The determination and allocation of fair values to the identifiable assets acquired and liabilities assumed is based on various assumptions and valuation methodologies requiring considerable management judgment. The most significant variables in these valuations are discount rates, terminal values, the number of years on which to base the cash flow projections, as well as the assumptions and estimates used to determine the cash inflows and outflows. Management determines discount rates to be used based on the risk inherent in the related activity’s current business model and industry comparisons. Terminal values are based on the expected life of products and forecasted life cycle and forecasted cash flows over that period. The Company’s estimates of fair value are based upon assumptions believed to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates. Any changes to provisional amounts identified during the measurement period are recognized in the reporting period in which the adjustment amounts are determined.

Acquisitions

During the periods presented, the Company completed several transactions to acquire controlling shares to enrich its products and to expand business. The Company makes estimates and judgments in determining the fair value of the acquired assets and liabilities, based in part on independent appraisal reports as well as its experience with purchasing similar assets and liabilities in similar industries. The amount excess of the purchase price over the fair value of the identifiable assets and liabilities acquired is recorded as goodwill. The major acquisitions during the periods presented are as follows:

Skyscanner Holdings Limited (“Skyscanner”)

On December 9, 2016, the Company consummated an acquisition of nearly all the equity interest of Skyscanner, a leading global travel search site headquartered in Edinburgh, the United Kingdom with the total purchase consideration of £1.4 billion (RMB 12 billion). The purchase consideration consists of £1.2 billion (RMB 10 billion) in cash and Ctrip ordinary shares. As of December 31, 2016, the total unpaid consideration was £41 million (RMB 361 million), which will be paid in three years. The financial statements of Skyscanner are consolidated by the Company from December 31, 2016 onwards since the financial results of Skyscanner during the period from December 10, 2016 through December 31, 2016 were not material to the Company.

The preliminary allocation of the purchase price of the assets acquired and liabilities assumed based on their fair values was as follows. The fair value of non-controlling interest was measured based on the purchase price, taking into account a discount reflective of the non-controlling nature of the interest.

	RMB
Net assets (including cash acquired with amount of RMB 571 million)	265,145,209
Identifiable intangible assets — trademark and domain	1,981,771,584
Identifiable intangible assets — Supplier relationship	928,904,634
Identifiable intangible assets — IT Platform	190,737,332
Deferred tax liabilities	(620,282,710	)
Non-controlling interests	(315,836,071	)
Goodwill	9,583,716,450

Total purchase consideration	12,014,156,428

The goodwill recognized for the Skyscanner acquisition was primarily made up of the expected synergies from combining operations of the acquiree and the acquirer, which do not qualify for separate recognition. The identifiable intangible assets primarily consist of trademark and domain, supplier relationship and IT Platform. The trademark and domain are assessed to be indefinite-lived intangible assets. The fair values of the supplier relationship and IT Platform are amortized over 9 years and 6 years, respectively on a straight-line basis.

Qunar Cayman Islands Limited (“Qunar”)

In October 2015, the Company completed a share exchange transaction with Baidu, Inc. (“Baidu”), which was the principal shareholder of Qunar, upon completion of the exchange, the Company issued approximately 11.5 million ordinary shares, with the fair value of US$ 3.4 billion (RMB 21.7 billion) to Baidu in exchange for approximately 179 million Class A (There were 193 million outstanding Class A shares in Qunar) and 11 million Class B ordinary share of Qunar. The Class A and Class B represents 3 votes and 1 vote per share respectively, and Class A ordinary shares were converted into Class B ordinary shares upon transfer. After the transaction, Ctrip owned ordinary share of Qunar representing approximately 45% of Qunar’s aggregate voting interest and 48 % economic interest.

In connection with the transaction with Baidu, on December 10, 2015, the Company issued approximately 4 million ordinary shares to certain special purpose vehicles in exchange for approximately 66 million Class B ordinary shares of Qunar issued as equity incentives to Qunar’s employees.

Below is the summary of the fair value of acquisition cost for these acquisitions:

	RMB	US$
Fair value of previously held equity interest (1)	21,698,582,100	3,416,184,974
Consideration paid in December 2015	10,842,783,275	1,687,067,570

Total purchase cost	32,541,365,375	5,103,252,544

(1)

Which represents fair value of purchase consideration for the initial 45% equity method investment in October 2015

As a result of the above transactions, the Company is deemed to be the beneficial owner of 256 million Class B ordinary shares of Qunar representing majority voting interest and therefore accounted for these transactions as step acquisitions of business combination under U.S GAAP. The previously held equity interest of Qunar from the exchange transaction with Baidu had been accounted for using equity method until the Company’s consolidation of Qunar upon completion of the transaction with the Qunar shareholders in December 2015 (Note 8). The financial statements of Qunar are consolidated by the Company from December 31, 2015 on since the financial results of Qunar during the period from December 10 through December 31, 2015 were not material.

The final allocation of the purchase price of the assets acquired and liabilities assumed based on their fair values was as follows which includes an adjustment made in 2016 to correct the immaterial understatements of goodwill and short term debt in the purchase price allocation table and consolidated balance sheet of the Company’s 2015 consolidated financial statements. The correction increased the goodwill and short term debt by RMB 582 million respectively to properly reflect the fair value of short term debt of Qunar as of the date of the acquisition. The correction was made in the Company’s 2016 financial statements and no revision was made in its 2015 financial statements as the impact is immaterial. The fair value of non-controlling interest was measured based on the purchase price, taking into account a discount reflective of the non-controlling nature of the interest based on the market price of Qunar’s publically traded shares.

	RMB
Cash and cash equivalents	5,169,733,816
Advance to suppliers	1,177,437,522
Prepayments and other current assets	3,075,154,225
Long-term investments	712,967,197
Fixed assets, net	232,085,350
Other non-current assets	127,412,235
Accounts payable	(1,584,668,322	)
Taxes payable	(1,028,960,573	)
Short-term debts	(3,884,097,322	)
Accrued expenses and other current liabilities	(4,526,855,580	)
Non-current liability	(93,019,969	)
Non-controlling interests	(5,282,358	)

Net assets of Qunar acquired	(628,093,779	)
Identifiable intangible assets — trademark and domain	8,998,429,167
Identifiable intangible assets — technology and supplier network for new products*	948,347,023
Deferred tax liabilities	(2,489,866,400	)
Non-controlling interests	(17,850,614,771	)
Goodwill	43,563,164,135

Total purchase consideration	32,541,365,375

The goodwill recognized from the Qunar acquisition was primarily attributable to the expected synergies from the consolidation of the seamless cooperation of the acquiree and the acquirer to further build and strengthen the vibrant travel ecosystem of the enlarged group. Such synergies, in order of their relative significance, are comprised of (1) the expected but unidentifiable significant business growth as a result of the consolidation of the fragmented domestic online travel market; (2) the strengthened market position from the increased market presence by the penetration into the supplementary travel related market of each other; (3) the enhanced relationship with other travel service providers and increased popularity and awareness among end users; and (4) the operation efficiencies and reductions in costs by eliminating redundant processes and facilities. In addition, the goodwill also includes the work force that is not separately recognized in the purchase price allocation.

The newly identifiable intangible assets of Qunar primarily consist of trademark and domain, technology and supplier network for new products. The trademark and domain are indefinite-lived intangible assets. The estimated fair value of the amortizable intangible assets (technology and supplier network for new products) is expected to amortised over a weighted average period of 5.2 years on a straight-line basis.

In the first half year of 2016, the Company made certain investments, in the form of limited partnership capital contribution or other financing arrangements respectively, in several non-U.S. investment entities, with an aggregate fair value of approximately US$2.9 billion (RMB 19 billion), including US$1 billion (RMB 6.5 billion) cash and newly issued ordinary shares (the “Investment”). These investment entities have spent the Investment to acquire the majority of minority stake of Qunar through privately negotiated transactions. In accordance with ASC 810, the Company consolidates the financial statements of these investment entities and as such the investments are eliminated in consolidation. The Company accounts for the subsequent purchases of the Qunar non-controlling shares as equity transactions by adjusting the carrying amount of non-controlling interest of Qunar to reflect the decrease in the non-controlling interest’s ownership in Qunar by RMB 15.5 billion. The difference between the amount of the change in non-controlling interest and the consideration paid was recognized in additional paid-in capital of the Company with amount of RMB 3.7 billion against the US$1.9 billion (RMB 12.7 billion) of additional paid-in capital from the newly issued ordinary shares.

The following unaudited pro forma consolidated financial information reflects the results of operations for the years ended December 31, 2014 and 2015, as if the business combination had occurred on January 1, 2014, and after giving effect to purchase accounting adjustments. These pro forma results have been prepared for comparative purposes only and do not purport to be indicative of what operating results would have been had the acquisitions actually took place on the beginning of the periods presented, and may not be indicative of future operating results.

In thousands	2014		2015
	RMB		RMB
Pro-forma net revenues	8,917,279		14,812,533
Pro-forma net loss	(1,889,396	)	(5,086,934	)

Travelfusion Limited (“Travelfusion”)

In January, 2015, the Company acquired 70% equity interest of Travelfusion. Travelfusion is a UK-based leading online Low Cost Carrier (LCC) travel content aggregator and innovator of Direct Connect global distribution solutions.

The purchase consideration was RMB 721 million (GBP75.6 million). The results of Travelfusion have been included in the consolidated financial statements of the Company since the acquisition date. The final allocation of the purchase price of the assets acquired and liabilities assumed based on their fair values was as follows. The non-controlling interest represents the fair value of the 30% equity interest not held by the Company:

	RMB
Net assets	36,936,493
Identifiable intangible assets — trademark and domain	78,058,071
Identifiable intangible assets — Business relationship	261,146,660
Identifiable intangible assets — IT Platform	5,051,377
Deferred tax liabilities	(72,293,783	)
Non-controlling interests	(275,995,802	)
Goodwill	687,633,024

Total purchase consideration	720,536,040

The identifiable intangible assets primarily consist of trademark and domain, business relationship and IT Platform. The trademark and domain are indefinite-lived intangible assets. The fair values of the business relationship and IT Platform are amortized over 10 years and 5 years, respectively on a straight-line basis.

A technology company focusing on hotel customer reviews

In November 2013 and October 2014, the Company consummated the acquisition of the entire equity shares in a technology company focusing on hotel customer reviews through step acquisitions with the total purchase consideration of RMB 240 million which included cash consideration of RMB 110 million and the previously held 35% non-controlling interest with the fair value of RMB 130 million. The cash consideration was paid in 2015. The Company also recognized a gain from the re-measurement of its previously held equity interest to the fair value of RMB 100 million in 2014. The Company reported the gain from re-measurement of previously held equity interests in the step acquisitions in “Equity in income/(loss) of affiliates” in the statement of income and comprehensive income.

The financial results of the acquired company have been included in the Company’s consolidated financial statements since the date the Company obtained control in October 2014 and were not significant to the Company for the year ended December 31, 2014. The final allocation of the purchase price of the assets acquired and liabilities assumed based on their fair values was as follows, which includes a measurement period adjustment in 2015 to increase the intangible assets and deferred tax liabilities with a decrease to goodwill of RMB 33 million as compared with the preliminary purchase price allocation in 2014.

	RMB
Net assets	2,134,170
Identifiable intangible assets — System, brand and customer relationship	44,752,000
Deferred tax liabilities	(11,188,000	)
Goodwill	333,320,722
Fair value of previously held equity interest	(129,360,000	)

Total purchase consideration	239,658,892

An offline travel agency

In December, 2014, the Company completed the transaction to acquire approximately 43% equity stake and obtained majority voting power of an offline travel agency. The purchase consideration was approximately RMB308 million (US$50 million). The total unpaid consideration amounted to RMB 196 million as of December31, 2014 has been paid in 2015. The financial results of the acquired entity have been included in the Company’s consolidated financial statements since the acquisition date. The final allocation of the purchase price of the assets acquired and liabilities assumed based on their fair values was as follows which includes a measurement period adjustment in 2015 to decrease the consideration and goodwill by RMB 1 million:

	RMB
Net assets (including the cash acquired of RMB142 million)	164,411,042
Identifiable intangible assets — customer relationship	67,000,000
Identifiable intangible assets — trademark	174,800,000
Deferred tax liabilities	(60,450,000	)
Non-controlling interests	(370,656,000	)
Goodwill	331,615,519

Total purchase consideration	306,720,561

The identifiable intangible assets primarily consist of trademark and customer relationship. The trademark is indefinite-lived intangible assets. The fair value of the customer relationship is amortized over 5 years on a straight-line basis.

For the years ended December 31, 2014, 2015 and 2016, other than the business combination of Qunar, the financial results and the pro forma revenues and net earnings of above mentioned acquisitions were not considered as significant to the Group under Rule 3-05 of Regulation S-X and ASC 805 respectively, either individually or in aggregate.

Other than the acquisitions disclosed above, none of other acquisition occurred during the periods presented was material to our businesses or financial results. Other immaterial acquisitions in 2016 resulted in goodwill increase of RMB 159 million. As of December 31, 2016, the total unpaid considerations for the other acquisitions were RMB 7 million.

Goodwill and other intangible assets

Goodwill represents the excess of the purchase price over the fair value of the identifiable assets and liabilities acquired as a result of the Company’s acquisitions of interests in its subsidiaries and consolidated VIEs.

Goodwill is not amortized but is reviewed at least annually for impairment or earlier, if an indication of impairment exists. Recoverability of goodwill is evaluated using a two-step process. In the first step, the fair value of a reporting unit is compared to its carrying value. If the fair value of a reporting unit exceeds the carrying value of the net assets assigned to a reporting unit, goodwill is considered not impaired and no further testing is required. If the carrying value of the net assets assigned to a reporting unit exceeds the fair value of a reporting unit, the second step of the impairment test is performed in order to determine the implied fair value of a reporting unit’s goodwill. Determining the implied fair value of goodwill requires valuation of a reporting unit’s tangible and intangible assets and liabilities in a manner similar to the allocation of purchase price in a business combination. If the carrying value of a reporting unit’s goodwill exceeds its implied fair value, goodwill is deemed impaired and is written down to the extent of the difference. The Company estimates total fair value of the reporting unit using discounted cash flow analysis, and makes assumptions regarding future revenue, gross margins, working capital levels, investments in new products, capital spending, tax, cash flows, and the terminal value of the reporting unit.

As of December 31, 2016, the step one analysis performed indicated that the fair value of the Company’s reporting unit was substantially greater than the respective carrying value. There was no impairment of goodwill during the years ended December 31, 2014, 2015 and 2016. Each quarter the Company reviews the events and circumstances to determine if goodwill impairment may be indicated.

Separately identifiable intangible assets that have determinable lives continue to be amortized and consist primarily of non-compete agreements, customer list, supplier relationship, technology and business relationship as of December 31, 2015 and 2016. The Company amortizes intangible assets on a straight-line basis over their estimated useful lives, which is three to ten years. The estimated life of amortized intangibles is reassessed if circumstances occur that indicate the life has changed. Other intangible assets that have indefinite useful life primarily include trademark and domain names as of December 31, 2015 and 2016. The Company evaluates indefinite-lived intangible assets each reporting period to determine whether events and circumstances continue to support an indefinite useful life. If an intangible asset that is not being amortized is subsequently determined to have a finite useful life, the asset is tested for impairment. The Company estimates total fair value of the reporting unit using discounted cash flow analysis, and makes assumptions regarding future revenue, gross margins, working capital levels, investments in new products, capital spending, tax, cash flows, and the terminal value of the reporting unit.

The Company reviews intangible assets with indefinite lives annually for impairment.

No impairment on other intangible assets was recognized for the years ended December 31, 2014, 2015 and 2016.

Impairment of long-lived assets

Long-lived assets (including intangible with definite lives) are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Reviews are performed to determine whether the carrying value of asset group is impaired, based on comparison to undiscounted expected future cash flows. If this comparison indicates that there is impairment, the Group recognizes impairment of long-lived assets to the extent the carrying amount of such assets exceeds the fair value.

Accrued liability for customer reward program

The Group’s end users participate in a reward program, which provides travel awards and other gifts to members based on accumulated membership points that vary depending on the services rendered and fees paid. The estimated incremental costs to provide free travel and other gifts are recognized as sales and marketing expense in the statements of income and comprehensive income and accrued for as a current liability as members accumulate points. As members redeem awards or their entitlements expire, the accrued liability is reduced correspondingly. As of December 31, 2015 and 2016, the Group’s accrued liability for its customer reward program amounted to RMB593 million and RMB658 million, respectively, based on the estimated liabilities under the customer reward program. Our expenses for the customer rewards program were approximately RMB355million, RMB399 million and RMB202 million for the years ended December 31, 2014, 2015 and 2016.

Deferred revenue

The Group has the coupon program, through which the Group provides coupons for end users who book selected hotels online through website. The end users who use the coupons receive credits in their virtual cash accounts upon check-out from the hotels and reviews for hotels submitted. The end users may redeem the amount of credits in their virtual cash account in cash, voucher, or mobile phone credit. The Group accounts for the estimated cost of future usage of coupons as contra-revenue or sales and marketing expenses in the consolidated statements.

Revenue recognition

The Group presents majority of its revenues on a net basis. Revenues are recognized at gross amounts where the Group undertakes the majority of the business risks by pre-purchasing inventories and acts as principal related to the services provided. The amount of revenues recognized at gross basis was immaterial during the years ended December 31, 2014, 2015 and 2016, respectively.

Accommodation reservation services

The Group receives commissions from travel suppliers for hotel room reservations through the Group’s transaction and service platform. Commissions from hotel reservation services rendered are recognized after end users have completed their stay at the applicable hotel and upon confirmation of pending payment of the commissions by the hotel. Contracts with certain travel suppliers contain incentive commissions typically subject to achieving specific performance targets and such incentive commissions are recognized when it is reasonably assured that the Group is entitled to such incentive commissions. The Group generally receives incentive commissions from monthly arrangements with hotels based on the number of hotel room reservations where end users have completed their stay. The Group presents revenues from such transactions on a net basis in the statements of income and comprehensive income as the Group, generally, does not assume inventory risks and has no obligations for cancelled hotel reservations.

Transportation ticketing services

Transportation ticketing services revenues mainly represent revenues from tickets reservations and other related services. The Group receives commissions from travel suppliers for ticketing services through the Group’s transaction and service platform under various services agreements. Commissions from ticketing services rendered are recognized after tickets are issued. The Group presents revenues from such transactions on a net basis in the statements of income as the Group, generally, does not assume inventory risks and has no obligations for cancelled airline ticket reservations. Loss due to obligations for cancelled ticket reservations is minimal in the past.

Packaged-tour

The Group receives referral fees from travel product providers for packaged-tour products and services through the Group’s transaction and service platform. Referral fees are recognized as commissions on a net basis after the packaged-tour service are rendered and collections are reasonably assured.

Corporate travel

Corporate travel management revenues primarily include commissions from air ticket booking, hotel reservation and packaged-tour services rendered to corporate clients. The Group contracts with corporate clients based on service fee model. Travel reservations are made via on-line and off-line services for air tickets, hotel and package-tour. Revenue is recognized on a net basis after the services are rendered, e.g. air tickets are issued, hotel stays or packaged-tour are completed, and collections are reasonably assured.

Other businesses

Other businesses comprise primarily of online advertising services, the sale of Property Management System (“PMS”), and related maintenance service.

The Company receives advertising revenues, which principally represent the sale of banners or sponsorship on the website and mobile from end users. Advertising revenues are recognized ratably over the fixed term of the agreement as services are provided.

The Company also conducts sale of PMS and related maintenance service. The sale of PMS is recognized upon customer acceptance. Maintenance service is recognized ratably over the term of the maintenance contract on a straight-line basis.

Allowance for doubtful accounts

Accounts receivables are recorded at the invoiced amount and do not bear interest. The Company reviews on a periodic basis for doubtful accounts for the outstanding trade receivable balances based on historical experience and information available. Additionally, we make specific bad debt provisions based on (i) our specific assessment of the collectability of all significant accounts; and (ii) any specific knowledge we have acquired that might indicate that an account is uncollectible. The facts and circumstances of each account may require us to use substantial judgment in assessing its collectability. The following table summarized the details of the Company’s allowance for doubtful accounts:

	2014		2015		2016
	RMB		RMB		RMB
Balance at beginning of year	5,896,903		14,707,184		38,237,658
Provision for doubtful accounts	11,737,580		32,080,786		32,339,617
Write-offs	(2,927,299	)	(8,550,312	)	(11,735,449	)

Balance at end of period	14,707,184		38,237,658		58,841,826

Cost of revenues

Cost of revenues consists primarily of payroll compensation of customer service center personnel, payments to travel suppliers, credit card service fee, telecommunication expenses, direct cost of principal travel tour services, depreciation, rentals and related expenses incurred by the Group’s transaction and service platform which are directly attributable to the rendering of the Group’s travel related services and other businesses.

Product development

Product development expenses include expenses incurred by the Group to develop the Group’s travel supplier networks as well as to maintain, monitor and manage the Group’s transaction and service platform. The Group recognizes website, software and mobile applications development costs in accordance with ASC 350-50 “Website development costs” and ASC 350-40 “Software — internal use software” respectively. The Group expenses all costs that are incurred in connection with the planning and implementation phases of development and costs that are associated with repair or maintenance of the existing websites and mobile applications or the development of software or mobile applications for internal use and websites content.

Sales and marketing

Sales and marketing expenses consist primarily of costs of payroll and related compensation for the Company’s sales and marketing personnel, advertising expenses, and other related marketing and promotion expenses. Advertising expenses, amounting to approximately RMB1.2 billion, RMB1.8 billion and RMB2.8 billion for the years ended December 31, 2014, 2015 and 2016 respectively, are charged to the statements of income as incurred.

Share-based compensation

Under ASC 718, the Company applied the Black-Scholes valuation model in determining the fair value of options granted. Risk-free interest rates are based on US Treasury yield for the terms consistent with the expected life of award at the time of grant. Expected life is based on historical exercise patterns. Expected dividend yield is determined in view of the Company’s historical dividend payout rate and future business plan. The Company estimates expected volatility at the date of grant based on historical volatilities. The Company recognizes compensation expense on all share-based awards on a straight-line basis over the requisite service period. Forfeiture rate is estimated based on historical forfeiture patterns and adjusted to reflect future change in circumstances and facts, if any. If actual forfeitures differ from those estimates, we may need to revise those estimates used in subsequent periods.

According to ASC 718, a change in any of the terms or conditions of stock options shall be accounted for as a modification of the plan. Therefore, the Company calculates incremental compensation cost of a modification as the excess of the fair value of the modified option over the fair value of the original option immediately before its terms are modified, measured based on the share price and other pertinent factors at the modification date. For vested options, the Company would recognize incremental compensation cost in the period the modification occurs and for unvested options, the Company would recognize, over the remaining requisite service period, the sum of the incremental compensation cost and the remaining unrecognized compensation cost for the original award on the modification date.

According to ASC 718, the Company classifies options or similar instruments as liabilities if the entity can be required under any circumstances to settle the option or similar instrument by transferring cash or other assets and such cash settlement is probable. The percentage of the fair value that is accrued as compensation cost at the end of each period shall equal the percentage of the requisite service that has been rendered at that date. Changes in fair value of the liability classified award that occur during the requisite service period shall be recognized as compensation cost over that period. Changes in fair value that occur after the end of the requisite service period are compensation cost of the period in which the changes occur. Any difference between the amount for which a liability award is settled and its fair value at the settlement date as estimated is an adjustment of compensation cost in the period of settlement.

Share incentive plans of Ctrip (excluding Qunar)

On November 5, 2004, the Company’s board of directors adopted a 2005 Employee’s Stock Option Plan (“2005 Option Plan”), which was approved by the shareholders of the Company in October 2005. The Company has reserved 3,000,000 ordinary shares for future issuances of options under the 2005 Option Plan. The terms of the 2005 Option Plan are substantially similar to the Company’s 2003 Option Plan. As of December 31, 2015 and 2016, 179,453 and 107,572 options were outstanding under the 2005 Option Plan respectively.

On October 17, 2007, the Company adopted a 2007 Share Incentive Plan (“2007 Incentive Plan”), which was approved by the shareholders of the Company on June 15, 2007. Under the 2007 Incentive Plan, the maximum aggregate number of shares, which may be issued pursuant to all share-based awards (including Incentive Share Options and Restricted Share Units (“RSU”)), is one million ordinary shares as of the first business day of 2007, plus an annual increase of one million shares to be added on the first business day of each calendar year beginning in 2008 to 2016. Under the 2007 Incentive Plan, the directors may, at their discretion, grant any employees, officers, directors and consultants of the Company and/or its subsidiaries such share-based awards. Shares options granted under 2007 Incentive Plan are vested over a period of 4 years. The Company granted 625,006 and 928,002 new shares options to employees with 4 year requisite service period for years ended December 31, 2015 and 2016, respectively. RSUs granted under 2007 Incentive Plan have a restricted period for 4 years. As of December 31, 2015 and 2016, 4,826,008 and 5,415,943 options and 865,408 and 1,462,239 RSUs were outstanding under the 2007 Incentive Plan.

A summary of option activity under the share incentive plans

The following table summarized the Company’s share option activity under all the option plans (in US$, except shares):

	Number of Shares		Weighted Average Exercise Price	Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding at December 31, 2013	4,130,732		70.42	4.99	528,988,489

Granted	1,472,449		172.56
Exercised	(573,351	)	62.52
Forfeited	(57,652	)	117.63

Outstanding at December 31, 2014	4,972,178		101.03	5.17	405,399,251

Granted	625,006		247.91
Exercised	(506,163	)	65.65
Forfeited	(85,560	)	156.32

Outstanding at December 31, 2015	5,005,461		122.00	4.77	1,244,544,670

Granted	928,002		322.20
Exercised	(368,722	)	80.70
Forfeited	(41,226	)	199.32

Outstanding at December 31, 2016	5,523,515		157.82	4.54	899,966,907

Vested and expect to vest at December 31, 2016	5,339,880		155.04	4.47	884,674,316

Exercisable at December 31, 2016	3,228,073		100.42	3.14	708,809,522

The Company’s current practice is to issue new shares to satisfy share option exercises.

The expected-to-vest options are the result of applying the pre-vesting forfeiture rate assumptions of 8% to total unvested options.

The aggregate intrinsic value in the table above represents the total intrinsic value (the aggregate difference between the Company’s closing stock price of US$320 as of December 30, 2016 and the exercise price for in-the-money options) that would have been received by the option holders if all in-the-money options had been exercised on December 31, 2016.

The total intrinsic value of options exercised during the years ended December 31, 2014, 2015 and 2016 were US$148million US$178 million and US$257 million, respectively.

The following table summarizes information related to outstanding and exercisable options as of December 31, 2016 (in US$, except shares):

	Outstanding			Exercisable
Range of Exercise Prices	Number of shares	Weighted-Average Exercise Price	Weighted-average Remaining Contractual Life (Years)	Number of shares	Weighted-Average Exercise Price	Weighted-average Remaining Contractual Life (Years)
35.00-58.99	677,760	38.02	0.10	677,760	38.02	0.10
59.00-77.99	1,120,518	77.12	4.01	892,716	76.46	3.98
78.00-96.99	510,008	91.52	2.19	510,008	91.52	2.19
97.00-129.99	369,445	105.01	2.71	369,445	105.01	2.71
130.00-259.99	2,845,784	236.86	6.46	778,144	185.94	5.63

	5,523,515			3,228,073

The weighted average fair value of options granted during the years ended December 31, 2014, 2015 and 2016 was US$78.10, US$109.93 and US$ 140.95 per share, respectively.

As of December 31, 2016, there was US$197 million of total unrecognized compensation cost, net of estimated forfeitures, related to unvested share options which are expected to be recognized over a weighted average period of 2.9 year. Total unrecognized compensation cost may be adjusted for future changes in estimated forfeitures. Total cash received from the exercise of share options amounted to RMB184,579,173, RMB52,117,597 and RMB211,720,242 for the year ended December 31, 2014, 2015 and 2016, respectively. The transfer agent was engaged by the Company to collect the exercise proceeds and remitted on regular basis and these amounts were presented as receivable from financial institution in Note 3.

The Company calculated the estimated fair value of share options on the date of grant using the Black-Scholes pricing model with the following assumptions for the years ended December 31, 2014, 2015 and 2016:

	2014	2015	2016
Risk-free interest rate	1.66%-1.75%	1.35%-1.59%	1.16%-1.66%
Expected life (years)	5.0	5.0	5.0
Expected dividend yield	0%	0%	0%
Volatility	49%-52%	49%-50%	48%-51%
Fair value of options at grant date per share	from US$74.98	from US$105.16	from US$133.85
	to US$109.57	to US$112.76	to US$141.72

For the years ended December 31, 2014, 2015 and 2016, the Company granted 761,514, 229,603 and 1,183,094 RSUs to employees with 4 year requisite service period, respectively. In additional, pursuant to the Replacement mentioned above, another 475,343 RSUs replaced the 1,901,372 options initially granted under the 2007 incentive plan.

The following table summarized the Company’s RSUs activities under all incentive plans (in US$, except shares):

	Number of Shares		Weighted average grant date fair value(US$)
Restricted shares
Unvested at December 31, 2013	623,424		83.60

Granted	761,514		185.40
Vested	(261,692	)	86.82
Forfeited	(64,638	)	148.02

Unvested at December 31, 2014	1,058,608		158.55

Granted	229,603		249.31
Vested	(271,683	)	129.21
Forfeited	(151,120	)	181.47

Unvested at December 31, 2015	865,408		185.17

Granted	1,183,094		301.62
Vested	(492,825	)	223.00
Forfeited	(93,438	)	237.69

Unvested at December 31, 2016	1,462,239		263.28

Total share-based compensation cost for the RSUs amounted to US$32.3 million, US$48.6 million and US$217.8 million for the years ended December 31, 2014, 2015 and 2016, respectively. As of December 31, 2016, there was US$244 million unrecognized compensation cost, net of estimated forfeitures, related to unvested restricted shares, which are to be recognized over a weighted average vesting period of 1.7 years. Total unrecognized compensation cost may be adjusted for future changes in estimated forfeitures. The Company determined the fair value of RSUs based on its stock price on the date of grant.

Share incentive plans of Qunar

In November 2007, Qunar’s shareholders approved the 2007 Share Incentive Plan (the “2007 Qunar Share Incentive Plan”), which is administered by Qunar’s Board of Directors or any of its committees. Under the Plan, Qunar’s Board of Directors may grant options to its employees, directors and consultants to purchase an aggregate of no more than 9,600,140 ordinary shares of Qunar. On December 29, 2011, Qunar’s Board of Directors approved the increase of the number of shares available for issuance under the 2007 Share Incentive Plan from 20,724,362 to 26,060,000 shares. On August 10, 2012, Qunar’s Board of Directors approved that starting from January 1, 2013, the number of shares available for issuance under the 2007 Share Incentive Plan would increase annually by 1.5% of the total outstanding ordinary and redeemable ordinary shares, if any, as of January 1 of that respective calendar year. On September 22, 2013, the Board of Directors of Qunar approved an increase in the number of shares available for issuance under the 2007 Share Incentive Plan by 6,066,896 shares. The options granted have a contractual term of ten years and generally vest over a four-year period, with 25% of the awards vesting one year after the date of grant and 1/16 of the remaining grants vesting on a quarterly basis thereafter. In December 2015, Qunar modified the awards under the 2007 Share Incentive Plan to be convertible to Ctrip American depositary shares (“ADSs”) at a ratio of 1 Qunar ADS to 0.725 Ctrip ADS. Unvested awards under the 2007 Share Incentive Plan became fully vested for certain employees and all cliff vesting conditions and performance-based vesting conditions were removed from all outstanding awards under the 2007 Share Incentive Plan. As of December 31, 2015 and 2016, 8,596,548 and 5,535,348 options were outstanding under the 2007 Qunar Option Plan respectively.

On November 18, 2015, Board of Directors of Qunar approved another share incentive plan (the “2015 Qunar Share Incentive Plan”), under which share options granted, when vested and exercised, will be entitled to be convertible to Ctrip ADSs at a ratio of 1 Qunar ADS to 0.725 Ctrip ADS. Certain options granted under the 2015 Qunar Share Incentive Plan vest immediately upon grant, while others vest on a quarterly basis on the same vesting schedule as those outstanding awards under the 2007 Share Incentive Plan. Under the 2015 Qunar Share Incentive Plan, Qunar may grant options to its employees, directors and consultants to purchase an aggregate of no more than 28,476,795 ordinary shares of the Company. These options granted have a contractual term of ten years. As of December 31, 2015 and 2016, 10,162,890 and 4,354,575 options were outstanding under the 2015 Qunar Option Plan respectively.

A summary of option activity under the share incentive plans

The following table summarized the Qunar’s share option activity under all the option plans (in US$, except shares):

	Number of Shares		Weighted Average Exercise Price	Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding at December 31, 2015	18,759,438		0.01	9.36	329,603,326

Granted	1,846,200		0.01
Exercised	(9,140,502	)	0.01
Forfeited/Cancelled	(1,575,213	)	0.01

Outstanding at December 31, 2015	9,889,923		0.01	8.54	99,393,726

Vested and expect to vest at December 31, 2016	9,241,666		0.01	8.53	92,878,743

Exercisable at December 31, 2016	2,107,686		0.01	8.52	21,182,244

The aggregate intrinsic value in the table above represents the difference between the fair value of Company’s ordinary share as at the balance sheet date and the exercise price.

The total intrinsic value of options exercised during the year ended December 31, 2016 was US$92 million.

The weighted average grant date fair value of options granted during the year ended December 31, 2016 was US$19.99.

The Company calculated the estimated fair value of share options on the date of grant using the Black-Scholes pricing model with the following assumptions for the years ended December 31, 2016:

		2016
Risk-free interest rate		0.22%-2.10%
Expected life (years)		0.13-6.00
Expected dividend yield		—
Volatility		26%-40%

In October 2016, Qunar announced that it had entered into definitive merger agreement for the going private transaction. Qunar announced that its going private transaction was approved by its shareholders and later completed in February 2017.

Immediately prior to the closing of the going private transaction of Qunar in February 2017, each outstanding vested option granted under the 2007 Qunar Share Incentive Plan and the 2015 Qunar Share Incentive Plan was exchanged for a number of Ctrip ADSs based on a ratio that ensures equivalent economic value, against the payment by the holder of the vested Qunar options of the full amount of exercise price payable ; and each outstanding unvested Qunar option granted under the 2007 Qunar Share Incentive Plan and the 2015 Qunar Share Incentive Plan was exchanged for an option of Ctrip to purchase ordinary shares of Ctrip based on a ratio that ensures equivalent economic value with its remaining vesting period unchanged.

Operating leases

Leases where substantially all the rewards and risks of ownership of assets remain with the leasing company are accounted for as operating leases. Payments made under operating leases net of any incentives received by the Group from the leasing company are charged to the statements of income on a straight-line basis over the lease periods.

Taxation

Deferred income taxes are provided using the balance sheet liability method. Under this method, deferred income taxes are recognized for the tax consequences of significant temporary differences by applying enacted statutory rates applicable to future years to differences between the financial statement carrying amounts and the tax bases of existing assets and liabilities. The tax base of an asset or liability is the amount attributed to that asset or liability for tax purposes. The effect on deferred taxes of a change in tax rates is recognized in income in the period enacted. A valuation allowance is provided to reduce the amount of deferred tax assets if it is considered unlikely that some portion of, or all of, the deferred tax assets will not be realized.

The Company applies ASC 740, “Income Taxes”. It clarifies the accounting for uncertainty in income taxes recognized in the Company’s consolidated financial statements and prescribes a more likely than not threshold for financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. It also provides guidance on derecognition of income tax assets and liabilities, classification of current and deferred income tax assets and liabilities, accounting for interest and penalties associated with tax positions, accounting for income taxes in interim periods, and income tax disclosures.

Other income/ (expense)

Other income/ (expense) consists of gain on deconsolidation of subsidiaries, financial subsidies, investment income and foreign exchange gains/(losses) etc.. Financial subsidies from local PRC government authorities are recorded as other income in the consolidated statements of income. There are no defined rules and regulations to govern the criteria necessary for companies to enjoy such benefits and the amount of financial subsidy are determined at the discretion of the relevant government authorities. Financial subsidies are recognized as other income when received. The foreign exchange losses in 2016 were mainly contributed by the USD appreciation against Chinese Yuan. Components of other income for the years ended December 31, 2014, 2015 and 2016 were as follows:

	2014		2015		2016
	RMB		RMB		RMB
Foreign exchange gains/(losses)	(55,930,392	)	12,638,982		(557,995,284	)
Bank charges	(49,713,255	)	(61,150,707	)	(101,973,794	)
Loss from impairment of long-term investment (Note 8)	(33,000,000	)	—		(47,986,882	)
Subsidy income	132,094,928		199,418,778		220,631,285
Gain on disposal of cost method investment (Note 8)	—		—		149,066,258
Gain on disposal of available-for-sale investment (Note 8)	—		—		140,651,759
Dividends from long-term investment	39,036,138		—		48,911,066
Reimbursement from the depository	—		11,582,882		46,345,221
Gain on deconsolidation of subsidiaries	789,193		2,294,451,702		252,000
Loss on disposal of a subsidiary	(1,529,046	)	—		—
Others	12,073,069		24,038,193		75,250,084

Total	43,820,635		2,480,979,830		(26,848,287	)

Statutory reserves

The Company’s PRC subsidiaries and the VIEs are required to allocate at least 10% of their after-tax profit to the general reserve in accordance with the PRC accounting standards and regulations. The allocation to the general reserve will cease if such reserve has reached to 50% of the registered capital of respective company. Appropriations to the enterprise expansion fund, staff welfare and bonus fund are at the discretion of the board of directors of Ctrip Computer Technology, Ctrip Travel Information, Ctrip Travel Network, Ctrip Information Technology and Jointwisdom, the subsidiaries of the Company. Appropriations to discretionary surplus reserve are at the discretion of the board of directors of the VIEs. These reserves can only be used for specific purposes and are not transferable to the Company in form of loans, advances, or cash dividends. Additionally, ezTravel, the Company’s subsidiary incorporated in Taiwan, is also required to allocate 10% of its after-tax profit to the statutory reserve in accordance with the Taiwan regulations. There is no such regulation of providing statutory reserve in Hong Kong. During the years ended December 31, 2014, 2015, and 2016, appropriations to statutory reserves have been made of approximately RMB16 million, RMB35 million, and RMB69 million, respectively.

Dividends

Dividends are recognized when declared.

PRC regulations currently permit payment of dividends only out of accumulated profits as determined in accordance with PRC accounting standards and regulations. The Company’s PRC subsidiaries can only distribute dividends after they have met the PRC requirements for appropriation to statutory reserves. Additionally, as the Company does not have any direct ownership in the VIEs, the VIEs cannot directly distribute dividends to the Company. The PRC government imposes control over its foreign currency reserves in part through direct regulation of the conversion of RMB into foreign exchange and through restrictions on foreign trade. As the majority of our revenues are in RMB, any restrictions on currency exchange may limit our ability to use revenue generated in RMB to fund our business activities outside China or to make dividend payments in U.S. dollars. Restricted net assets of the Company’s PRC subsidiaries and VIEs not distributable in the form of dividends to the parent as a result of the aforesaid PRC regulations and other restrictions were RMB5.0 billion as of December 31, 2016.

As a result of the aforementioned PRC regulation and the Company’s organizational structure, accumulated profits of the subsidiaries in PRC distributable in the form of dividends to the parent as of December 31, 2014, 2015 and 2016 were RMB5.0 billion, RMB7.2 billion and RMB8.2 billion, respectively. The Company’s PRC subsidiaries and VIEs are able to enter into royalty and trademark license agreements or certain other contractual arrangements at the sole discretion of the Company, for which the compensatory element of the arrangement is deducted from the accumulated profits.

Effective January 1, 2008, current CIT Law imposes a 10% withholding income tax for dividends distributed by foreign invested enterprises to their immediate holding companies outside mainland China. A lower withholding tax rate will be applied if there is a tax treaty arrangement between mainland China and the jurisdiction of the foreign holding company. Distributions to holding companies in Hong Kong that satisfy certain requirements specified by PRC tax authorities, for example, will be subject to a 5% withholding tax rate. Furthermore, pursuant to the applicable circular and interpretations of the current EIT Law, dividends from earnings created prior to 2008 but distributed after 2008 are not subject to withholding income tax.

Earnings/(loss) per share

In accordance with “Computation of Earnings Per Share”, basic earnings per share is computed by dividing net income attributable to common shareholders by the weighted average number of common shares outstanding during the year. Diluted earnings per share is calculated by dividing net income attributable to common shareholders as adjusted for the effect of dilutive ordinary equivalent shares, if any, by the weighted average number of ordinary and dilutive ordinary equivalent shares outstanding during the year. Dilutive ordinary equivalent shares consist of ordinary shares issuable upon the exercise of outstanding share options (using the treasury stock method).

If the number of common shares outstanding increases as a result of a stock dividend or stock split or decreases as a result of a reverse stock split, the computations of basic and diluted EPS shall be adjusted retroactively for all periods presented to reflect that change in capital structure. If changes in common stock resulting from stock dividends, stock splits, or reverse stock splits occur after the close of the period but before the financial statements are issued or are available to be issued, the per-share computations for those and any prior-period financial statements presented shall be based on the new number of shares.

Effective December 1, 2015, the Company effected a change of the ratio of its American depositary shares (“ADSs”) to ordinary shares from four (4) ADSs representing one (1) ordinary share to eight (8) ADSs representing one (1) ordinary share. The historical and present earnings/ (loss) per share for the periods presented herein has been retrospectively adjusted to reflect such effect.

Treasury stock

On April 3, 2014, our board of directors approved a US$600 million share repurchase plan. The share-repurchase programs do not require the Company to acquire a specific number of shares and may be suspended or discontinued at any time.

Segment reporting

The Company operates and manages its business as a single segment. Resources are allocated and performance is assessed by the CEO, whom is determined to be the Chief Operating Decision Maker (CODM). Since the Company operates in one reportable segment, all financial segment and product information required by this statement can be found in the consolidated financial statements.

The Company primarily generates its revenues from end users in Great China Area, and assets of the Company are also primarily located in Great China Area. Accordingly, no geographical segments are presented.

Recent accounting pronouncements

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”). ASU 2014-09 supersedes the revenue recognition requirements in ASC Topic 605, Revenue Recognition, and most industry-specific guidance. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The new standard will require the Company to separate performance obligations within a contract, determine total transaction costs, and ultimately allocate the transaction costs across the established performance obligations. In August 2015, the FASB issued ASU No. 2015-14, “Revenue from Contracts with Customers” (Topic 606): Deferral of the Effective Date, which delays the effective date of ASU 2014-09 by one year. As a result, ASU 2014-09 will become effective for the Company beginning in fiscal 2018 under either full or modified retrospective adoption, with early adoption permitted as of the original effective date of ASU 2014-09. The Company has set up an implementation team that is currently in the process of analyzing each of the Company’s revenue streams in accordance with the new revenue standard to determine the impact on the Company’s consolidated financial statements. The Company plans to continue the evaluation, analysis, and documentation of its adoption of ASU 2014-09 (including those subsequently issued updates that clarify ASU 2014-09’s provisions) throughout 2017 as the Company works towards the implementation and finalizes its determination of the impact that the adoption will have on its consolidated financial statements. The Company expects to adopt the new revenue recognition guidance in the first quarter of 2018.

In August 2014, the FASB issued ASU No. 2014-15, “Presentation of Financial Statements — Going Concern”. This standard requires management to evaluate for each annual and interim reporting period whether it is probable that the reporting entity will not be able to meet its obligations as they become due within one year after the date that the financial statements are issued. If the entity is in such a position, the standard provides for certain disclosures depending on whether or not the entity will be able to successfully mitigate its going concern status. This guidance is effective for annual periods ending after December 15, 2016 and interim periods within annual periods beginning after December 15, 2016. The Company has adopted this new guidance and determined it has no impact in the current year.

In January, 2016, the FASB issued ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities. This accounting standard retains the current accounting for classifying and measuring investments in debt securities and loans, but requires equity investments to be measured at fair value with subsequent changes recognized in net income, except for those accounted for under the equity method or requiring consolidation. This guidance also changes the accounting for investments without a readily determinable fair value and that do not qualify for the practical expedient to estimate fair value. A policy election can be made for these investments whereby estimated fair value may be measured at cost and adjusted in subsequent periods for any impairment or changes in observable prices of identical or similar investments. This revised guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company is in the process of evaluating the impact of the standard on its consolidated financial statements.

In February, 2016, the FASB issued ASU No. 2016-02, Leases. This accounting standard requires lessees to recognize assets and liabilities related to lease arrangements longer than 12 months on the balance sheet. This standard also requires additional disclosures by lessees and contains targeted changes to accounting by lessors. The updated guidance is effective for interim and annual periods beginning after December 15, 2018, and early adoption is permitted. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee have not significantly changed from previous GAAP. The Company is in the process of evaluating the impact of the standard on its consolidated financial statements.

In March, 2016, the FASB issued ASU No. 2016-06, Contingent Put and Call Options in Debt Instruments. The amendments in this Update apply to all entities that are issuers of or investors in debt instruments (or hybrid financial instruments that are determined to have a debt host) with embedded call (put) options. The Amendments in this Update clarify the requirements for assessing whether contingent call (put) options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts, which is one of the criteria for bifurcating an embedded derivative. An entity performing the assessment under the amendments in this Update is required to assess the embedded call (put) options solely in accordance with the four-step decision sequence. Consequently, when a call (put) option is contingently exercisable, an entity does not have to assess whether the event that triggers the ability to exercise a call (put) option is related to interest rates or credit risks. The amendments are an improvement to GAAP because they eliminate diversity in practice in assessing embedded contingent call (put) options in debt instruments. For public companies, the amendments in this Update are effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. An entity should apply the amendments in this Update on a modified retrospective basis to existing debt instruments as of the beginning of the fiscal year for which the amendments are effective. The Company is in the process of evaluating the impact of the Update on its consolidated financial statements.

In March 2016, the FASB issued ASU No. 2016-07, Simplifying the Transition to the Equity Method of Accounting. The amendments in this Update eliminate the requirement that when an investment qualified for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. The amendments require that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previous held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. Therefore, upon qualifying for the equity method of accounting, no retroactive adjustment of the investment is required. The amendments in this Update require that an entity that has an available-for-sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income at the date the investment becomes qualified for use of the equity method. The amendments in this Update are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. The amendments should be applied prospectively upon their effective date to increase in the level of ownership interest or degree of influence that result in the adoption of the equity method. Earlier application is permitted. The Company is in the process of evaluating the impact of the Update on its consolidated financial statements.

In March 2016, the FASB issued ASU 2016-09, Compensation — Stock Compensation (Topic 718): Improvements to Employee Share - Based Payment Accounting, which outlines new provisions intended to simplify various aspects related to accounting for share - based payments and their presentation in the financial statements. The standard is effective for the Company from calendar 2017 and from the first interim period of calendar 2017. Early adoption is permitted. The Company is evaluating the impact of the adoption of this update on its consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments — Credit Losses (Topic 326), Measurement of Credit Losses on Financial Statements. This ASU requires a financial asset (or group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset. The standard is effective for the Company from calendar 2020, with early adoption permitted for calendar 2019. The Company is evaluating the impact of the adoption of this standard on its consolidated financial statements.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) - Classification of Certain Cash Receipts and Cash Payments. This Update addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. The amendments in this Update are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. An entity that elects early adoption must adopt all of the amendments in the same period. The amendments in this Update should be applied using a retrospective transition method to each period presented. If it is impracticable to apply the amendments retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The Company is in the process of evaluating the impact of the Update on its consolidated financial statements.

In October 2016, the FASB issued ASU 2016-16, Income taxes (Topic 740) - Intra-Entity Transfers of Assets Other Than Inventory, to improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. The amendments in this Update eliminate the exception for an intra-entity transfer of an asset other than inventory. The Update does not change GAAP for an intra-entity transfer of inventory. The amendments in this Update do not include new disclosure requirements; however, existing disclosure requirements might be applicable when accounting for the current and deferred income taxes for an intra-entity transfer of an asset other than inventory. For public business entities, the amendments in this Update are effective for annual reporting periods beginning after December 15, 2017, including interim reporting periods within those annual reporting periods. Early adoption is permitted for all entities as of the beginning of an annual reporting period for which financial statements (interim or annual) have not been issued or made available for issuance. The amendments in this Update should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company is in the process of evaluating the impact of the Update on its consolidated financial statements.

In November 2016, the FASB issued ASU 2016-18: Statement of Cash Flows (Topic 230): Restricted Cash. The amendments in this Update require that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Therefore, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The amendments in this Update do not provide a definition of restricted cash or restricted cash equivalents. The amendments in this Update are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The amendments in this Update should be applied using a retrospective transition method to each period presented. The Company is in the process of evaluating the impact of the Update on its consolidated financial statements.

In January 2017, the FASB issued ASU 2017-01: Business Combinations (Topic 805): Clarifying the Definition of a Business. The Update requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This screen reduces the number of transactions that need to be further evaluated. If the screen is not met, the amendments in this Update (1) require that to be considered a business, a set must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create output and (2) remove the evaluation of whether a market participant could replace missing elements. Public business entities should apply the amendments in this Update to annual periods beginning after December 15, 2017, including interim periods within those periods. Early application of the amendments in this Update is allowed. The amendments in this Update should be applied prospectively on or after the effective date. No disclosures are required at transition. The Company is in the process of evaluating the impact of the Update on its consolidated financial statements.

In January 2017, the FASB issued ASU 2017-04: Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. To simplify the subsequent measurement of goodwill, the Board eliminated Step 2 from the goodwill impairment test. Under the amendments in this Update, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. An entity should apply the amendments in this Update on a prospective basis. An entity is required to disclose the nature of and reason for the change in accounting principle upon transition. A public business entity that is a U.S. Securities and Exchange Commission (SEC) filer should adopt the amendments in this Update for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company is in the process of evaluating the impact of the Update on its consolidated financial statements.

Certain risks and concentration

Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, short-term investment, accounts receivable, amounts due from related parties, prepayments and other current assets. As of December 31, 2014, 2015 and 2016, substantially all of the Company’s cash and cash equivalents, restricted cash and short-term investment were held in major financial institutions located in the PRC and in Hong Kong, which management considers to be of high credit quality based on their credit ratings. Accounts receivable are generally unsecured and denominated in RMB, and are derived from revenues earned from operations arising primarily in the PRC.

No individual customer accounted for more than 10% of net revenues for the years ended December 31, 2014, 2015 and 2016. No individual customer accounted for more than 10% of accounts receivable as of December 31, 2015 and 2016.

PREPAYMENTS AND OTHER CURRENT ASSETS

12 Months Ended

Dec. 31, 2016

PREPAYMENTS AND OTHER CURRENT ASSETS

PREPAYMENTS AND OTHER CURRENT ASSETS

3. PREPAYMENTS AND OTHER CURRENT ASSETS

Components of prepayments and other current assets as of December 31, 2015 and 2016 were as follows:

	2015	2016
	RMB	RMB
Prepayments and deposits to vendors	5,527,802,541	5,082,058,275
Prepaid expenses	262,797,329	439,983,044
Receivables from financial institution	221,221,736	207,182,863
Employee advances	453,304,997	99,042,188
Interest receivable	71,558,995	81,999,660
Others	213,280,229	296,719,656

Total	6,749,965,827	6,206,985,686

LONG-TERM DEPOSITS AND PREPAYMENTS

12 Months Ended

Dec. 31, 2016

LONG-TERM DEPOSITS AND PREPAYMENTS

LONG-TERM DEPOSITS AND PREPAYMENTS

4. LONG-TERM DEPOSITS AND PREPAYMENTS

The Group’s subsidiaries and VIEs are required to pay certain amounts of deposit to airline companies and hotel suppliers. The subsidiaries and VIEs are also required to pay deposit to local travel bureau as pledge for insurance of traveler’s safety.

Components of long-term deposit and prepayments as of December 31, 2015 and 2016 were as follows:

	2015	2016
	RMB	RMB

Prepayments for purchase of long lived assets	120,699,207	625,084,070
Deposits paid to airline suppliers	141,890,707	244,072,331
Deposits paid to hotel suppliers	118,851,829	126,728,198
Deposits paid to lessors	40,360,900	21,615,099
Deposits paid to travel bureau	2,586,292	5,551,278
Others	62,397,033	124,228,221

Total	486,785,968	1,147,279,197

LONG-TERM LOAN RECEIVABLE	12 Months Ended
LONG-TERM LOAN RECEIVABLE	Dec. 31, 2016
LONG-TERM LOAN RECEIVABLE
LONG-TERM LOAN RECEIVABLE	5. LONG-TERM LOAN RECEIVABLE In 2013, the Company entered into a loan agreement with Felicity Investment Holdings Limited (“Felicity”) for a total amount of approximately US$29.5 million with a 5% compounded annual interest rate. The balance of the loan and the compounded accrued interests will be received at the end of the 5 years term of the loan. The loan receivable is fully collateralized with shares of a subsidiary of Felicity. In February 2016, Felicity fully repaid the loan with total amount of US$ 31 million (Rmb 212 million). In 2015, the Company provided a loan facility with the total amount of US$ 300 million to another subsidiary of Felicity. During the year ended December 31, 2015, US$ 140 million (RMB 872 million) of the facility had been drawn down and repaid. As of December 31, 2016, the unused loan facility was US$ 160 million, which can be drawn down from June 2016 with term of 2 years from the drawn down date with 5% annual interest rate. In April, 2015, the Company entered into a loan agreement with eHi for a total amount of RMB 300 million with the term of 3 years. The annual interest rate of the loan is 6.9% and will be received at the end of every quarter. In October 2016, eHi repaid RMB200 million. As of December 31, 2016, the balance of the loan and the accrued interests was approximately RMB102 million.

- Definition

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

+ References + Details

LAND USE RIGHTS	12 Months Ended
LAND USE RIGHTS	Dec. 31, 2016
LAND USE RIGHTS
LAND USE RIGHTS	6. LAND USE RIGHTS The Company’s land use rights are related to the payment to acquire three land use rights, the first one is at total cost of approximately RMB68 million for approximately 17,000 square meters of land in Shanghai, on which the Group has built an information and technology center. The second one was acquired at RMB49 million for approximately 19,500 square meters of land in Nantong, which was put into use in May 2010. The third one was RMB10 million for approximately 9,000 square meters of land in Chengdu, on which the Group has built an information and technology center of West China. According to land use right policy in the PRC, the Company has a 50-year use right over the land in Shanghai, a 40-year use right over the land in Nantong, and a 50-year use right over the land in Chengdu, which are used as the basis for amortization, respectively. Amortization expense for the years ended December 31, 2014, 2015 and 2016 was approximately RMB3 million, RMB2 million and RMB3 million, respectively. As of December 31, 2015 and 2016, the net book value was RMB102,328,181 and RMB99,544,772 respectively.

PROPERTY, EQUIPMENT AND SOFTWARE

12 Months Ended

Dec. 31, 2016

PROPERTY, EQUIPMENT AND SOFTWARE

PROPERTY, EQUIPMENT AND SOFTWARE

7. PROPERTY, EQUIPMENT AND SOFTWARE

Property, equipment and software and its related accumulated depreciation and amortization as of December 31, 2015 and 2016 were as follows:

	2015		2016
	RMB		RMB
Buildings	5,048,349,531		5,148,644,010
Computer equipment	534,734,639		731,530,644
Website-related equipment	377,457,565		536,705,335
Furniture and fixtures	125,609,830		178,703,320
Software	101,444,245		124,082,233
Leasehold improvements	129,401,013		115,997,785
Construction in progress	11,231,274		10,056,257
Less: accumulated depreciation and amortization	(772,268,598	)	(1,253,759,503	)

Total net book value	5,555,959,499		5,591,960,081

Depreciation expense for the years ended December 31, 2014, 2015 and 2016 was RMB174 million, RMB256 million and RMB461 million, respectively.

INVESTMENTS

12 Months Ended

Dec. 31, 2016

INVESTMENTS

INVESTMENTS

8. INVESTMENTS

The Company’s long-term investments are consisted of the follows:

	2015	2016
	RMB	RMB

Held to maturity investment
Long-term time deposit	1,020,425,292	1,059,812,729

Available-for-sale investments-measured at fair value
China Eastern Airlines	—	3,293,478,259
Tujia	2,876,749,196	3,081,585,780
Hanting	1,116,231,309	1,984,037,413
eLong	—	1,877,945,423
LY.com	1,745,309,616	1,523,436,120
MakeMyTrip	—	1,519,309,068
eHi	793,869,127	612,309,518
Tuniu	430,659,093	252,746,139
Easy Go	527,301,676	228,317,887
Others	316,742,816	94,311,000

Equity method investments
BTG	—	2,498,763,234
eLong	2,632,145,397	235,138,072
Homeinns	961,773,378	—
Investment funds	261,520,937	616,160,937
Others	199,527,495	764,137,539

Others-cost method investments	988,268,166	891,333,247

Total net book value	13,870,523,498	20,532,822,365

Held to maturity investment

In September 2015, the Company placed a three-year time deposit of RMB 1 billion to a domestic bank with fixed interest rate of 3.90% per annum.

Available-for-sale investments

China Eastern Airlines Limited (“China Eastern Airlines”)

In April 2016, the Company purchased 466 million ordinary share of China Eastern Airlines with the total consideration of RMB 3 billion which represented around 3% equity interest of China Eastern Airlines. China Eastern Airlines is listed on the New York, Hong Kong and Shanghai stock exchange. The shares of China Eastern Airlines that the Company purchased are traded at Shanghai Stock Exchange. The Company does not have the ability to exercise significant influence over China Eastern Airlines. The investment in China Eastern Airlines is therefore classified as available-for-sale investment. As of December 31, 2016, the closing price of China Eastern Airlines A shares was RMB 7.07 per share. The Company re-measured the investment at a fair value of RMB 3.3 billion with RMB 293 million unrealized gain recorded in other comprehensive income.

Tujia

Tujia used to be a consolidated subsidiary of the Company. In July 2015, after a private placement of Tujia, the equity interest of the Company in Tujia was diluted to 45% and the Company was no longer entitled to appoint the majority of the board of directors of Tujia. As a result, the Company lost the control in Tujia and the financial position and results of operations of Tujia were therefore deconsolidated. A gain of RMB 2.3 billion (approximately US$ 350 million) was recognized in the Other income/ (expense) (Note 2) in connection with the deconsolidation of Tujia when the investment in Tujia was re-measured at its fair value of RMB 2.8 billion which was determined by management with the assistance of an independent appraisal using Level 3 inputs. As of December 31, 2016, the Company held 101,498,094 convertible and redeemable preferred shares of Tujia. The convertible and redeemable preferred shares that the Company subscribed from Tujia are not in substance common stocks and are classified as available-for-sale investment.

Hanting

As a result of a series of investments on Hanting in 2010, the Company holds 22,049,446 shares of Hanting, representing approximately 9% of Hanting’s total outstanding shares with the aggregated investment cost of US$67.5 million (approximately RMB0.5 billion). The Company does not have the ability to exercise significant influence and the investment in Hanting is classified as available-for-sale investment. As of December 31 2016, the closing price of Hanting was US$51.84 per ADS. The Company re-measured the investment in Hanting at a fair value of RMB2.0 billion (approximately US$286 million), with RMB1.5 billion unrealized gain recorded in other comprehensive income.

LY.com

In April, 2014, the Company purchased a minority stake of LY.com with a cash consideration of approximately RMB1.4 billion. According to the purchase agreement and shareholders arrangement, the investment on LY.com is considered not in substance common stock and is classified as available-for-sale investments. As of December 31 2016, the Company re-measured the investment in LY.com at a fair value of RMB1.5 billion (approximately US$219 million), with RMB0.1 billion unrealized gain recorded in other comprehensive income.

MakeMyTrip

In January, 2016, the Company made an investment of US$180 million (approximately RMB1.2 billion) in MakeMyTrip Limited (“MakeMyTrip”), an Indian online travel company to purchase its newly issued convertible bonds. In October 2016, the Company converted the convertible bonds into 9,857,028 ordinary shares of MakeMyTrip which represented approximately 10% equity interest in MakeMyTrip and appointed 1 out of 10 board seats of MakeMyTrip. The Company does not have the ability to exercise significant influence and the investment in MakeMyTrip is therefore classified as available-for-sale investment. As of December 31 2016, the closing price of MakeMyTrip was US$22.2 per share, the Company remeasured the investment in MakeMyTrip at a fair value of RMB1.5 billion (approximately US$219 million), with RMB0.3 billion unrealized gain recorded in other comprehensive income.

eHi

As a result of a series of investments on eHi since 2013, the Company has held an aggregate equity interest of approximately 14% of eHi’s total outstanding share and 19.6% of eHi’s voting power as of December 31, 2016 with the aggregated investment cost of US$107 million (approximately RMB0.7 billion). The Company does not have the ability to exercise significant influence and the investment in eHi is classified as available-for-sale investment. As of December 31, 2016, the closing price of eHi was US$9.06 per ADS. The Company remeasured the investment in eHi at a fair value of RMB612 million (approximately US$88 million), with RMB0.1 billion unrealized loss recorded in other comprehensive income.

Tuniu

The Company held an aggregate equity interest of approximately 4% of Tuniu as of December 31, 2016 with the aggregated investment cost of US$ 50 million (approximately RMB0.3 billion). The Company does not have the ability to exercise significant influence and the investment in Tuniu is classified as available-for-sale investment. As of December 31 2016, the closing price of Tuniu was US$8.75 per ADS. The Company remeasured the investment in Tuniu at a fair value of RMB253 million (approximately US$36 million), with RMB94 million unrealized loss recorded in other comprehensive income.

Easy Go

In December 2013 and August 2014, the Company subscribed Easy Go’s Series B and Series C convertible preferred shares with a total consideration of US$53 million (approximately RMB 324 million). The convertible preferred shares that the Company subscribed from Easy Go are not in substance common stocks and are classified as available-for-sale investment.

In February 2016, the Company consummated a transaction to sell approximately 6 million Easy Go’s convertible and redeemable preferred shares to a third party institution for a total consideration of US$49 million (approximately RMB317 million) which resulted in a gain of US$23 million (approximately RMB135 million) recycled from the other comprehensive income and reported in “Other income/ (expense)” (Note 2). As of December 31, 2016, the Company remeasured the investment in Easy Go at a fair value of RMB228 million (approximately US$33 million), with RMB 44 million unrealized gain recorded in other comprehensive income.

Other-than-temporary impairment

The Company monitors its investments for other-than-temporary impairment by considering factors including, but not limited to, current economic and market conditions, the operating performance of the investees including current earnings trends and other company-specific information. In 2014 and 2016, the Company recorded the other than temporary investment impairment of RMB33 million and RMB48 million in “Other income/ (expense)”, respectively, for other an available-for-sale investment (RMB 33 million in 2014 and RMB 36 million in 2016) and cost method investments (RMB 12 million in 2016) based on the difference of its fair value and cost. There was no other-than-temporary impairment charge incurred in 2015.

Equity method investments

Homeinns Hotel Group (“Homeinns”) and BTG Hotels (Group) Co., Ltd., (“BTG”)

The Company used to hold an aggregate equity interest of approximately 15% of the outstanding shares of Homeinns (or 14,400,765 shares). Given the level of investment and the common directors on board of directors of both the Company and Homeinns, the Company applied equity method of accounting to account for the investment in Homeinns.

In December 2016, the Company consummated the share exchange transaction with BTG, a PRC company listed on the Shanghai Stock Exchange and is principally engaged in the management of hotels and tourism destinations. The Company exchanged its 15% equity interest in Homeinns in consideration for 104,901,899 ordinary shares of BTG with an exchange date fair value of RMB 2.5 billion. The share exchange was accounted for as the disposal of the Company’s investment in Homeinns and a gain with amount of RMB 1,369 million was recognized and reported in “Equity in income/(loss) of affiliates” in the statement of income and comprehensive income. In 2016, the total equity in income from Homeinns investment, including exchange gain and equity share of net income of Homeinns in 2016 before its disposal was RMB 1,409 million. After the transaction, the Company holds approximately 22% of BTG’s total outstanding shares and is entitled to appoint 1 out of 11 board of directors of BTG. The Company believes it has significant influence over BTG and therefore applied equity method to account for the investment in BTG on one quarter lag basis since the financial statements of BTG were not available within a sufficient time period.

Qunar

As disclosed in Note 2 “Acquisition”, the Company started to consolidate the financial statements of Qunar from December 31, 2015. Between October and December of 2015, the previously held equity interest of Qunar from the exchange transaction with Baidu was accounted for using equity method.

In 2015, the Company recognized the share of cumulative loss of Qunar with amount of RMB 2.4 billion, which primarily included the share based compensation charges recognized by Qunar during the period, The Company subsequently recognized a gain from the re-measurement of aforementioned previously held 48% equity interest of Qunar to its fair value on December 10, 2015, the date of the business combination with amount of RMB 2.4 billion, which included currency translation impact of RMB 0.4 billion. The Company reported such amount in equity in income/(loss) on affiliates, the same line item of the statement of income and comprehensive income in which the equity pick-up of Qunar’s results of operations is presented.

eLong

In May 2015, the Company entered into a share purchase agreement with certain selling shareholders, including Expedia, Inc. (“Expedia”), to acquire approximately 38% share capital of eLong, Inc. (“eLong”). The total consideration was approximately USD422 million. The Company has one out of eight board seats of eLong. The Company applies the equity method to account for the investment starting June 2015.

In May 2016, in connection with a consummated “going-private” transaction of eLong, eLong was reorganized and became the wholly owned subsidiary of E-dragon Holdings Limited (“E-dragon”) (“Reorganization”). All the ordinary shares and high-vote ordinary shares of eLong previously held by the Company and accounted for under equity method were converted into the ordinary shares and preferred shares of E-dragon respectively. The Company disposed its previously held investment in eLong at its carrying value and recognized the ordinary shares and preferred shares of E-dragon it obtained at their respective fair value on the date of transfer. The Company determined that the fair value of the ordinary shares and preferred shares of E-dragon approximated to the carrying value of its investment in eLong.

After the transaction, the Company applies equity method of accounting for its investment in E-dragon’s ordinary shares, it acquired on the date of transfer, on one quarter lag basis since the financial statements of E-dragon were not available within a sufficient time period. The preferred shares of E-dragon that the Company holds are redeemable and convertible and hence not considered as in substance common stocks and are classified as available-for-sale debt security.

The carrying amount and unrealized securities holding loss for investment in eLong during the year was as follows:

	2015		2016
			Before the Reorganization		After the Reorganization
	RMB		RMB		RMB
Investment cost	2,615,954,303		2,732,852,735		2,545,486,916
Transfer out to Available-for-sale investments	—		—		(1,778,322,045	)
Foreign currency translation	116,898,432		70,917,988		33,536,784

Total investment cost	2,732,852,735		2,803,770,723		800,701,655


Value booked under equity method
Share of cumulative loss	(98,560,550	)	(255,175,523	)	(563,698,613	)
Amortization of outside difference, net of tax	(2,146,788	)	(3,108,284	)	(1,864,970	)

Total booked value under equity method.	(100,707,338	)	(258,283,807	)	(565,563,583	)


Net book value	2,632,145,397		2,545,486,916		235,138,072

In 2016, out of the net loss of eLong of RMB 1,635 million, the Company recognized the loss, including the equity pick-up of RMB 722 million and dilution impact of RMB 1 million in “Equity in income/(loss) of affiliates” of the Comprehensive income statement.

Investment funds

In 2015 and 2016, the Company made some investments in several third party investment funds as their limited partners. The Company believes it has significant influence over these investment funds as a result of its involvement of the investment committee and participating in significant investment decisions, and therefore accounted for these investments under equity methods on one quarter lag basis. In 2015 and 2016, the share of cumulative losses of these investment funds was amounted to nil and Rmb 17 million.

The equity method loss from other equity method investments was RMB 77 million and RMB 67 million for 2015 and 2016, respectively.

Other than Qunar and eLong in 2015 and 2016 respectively, all other equity method investments are not considered individually material. And in an aggregate basis, the Company summarizes the condensed financial information of the Company’s equity investments as a group below in accordance with Rule 4-08 of Regulation S-X.

					Year ended December 31,
	2016				2015				2014
	eLong		Other equity investments		Qunar		Other equity investments		Equity investments
Operating data:
Revenue	1,895,409,404		5,917,850,003		841,814,520		7,069,224,177		6,667,675,419
Gross profit	997,644,227		4,785,282,088		537,240,212		1,581,396,551		1,280,767,842
Income from operations	(1,312,847,794	)	155,471,096		(4,792,664,736	)	(20,961,158	)	646,012,004
Net income/(loss)	(1,635,384,928	)	(62,190,299	)	(4,917,200,749	)	(189,461,030	)	446,181,771
Net income/(loss) attributable to our equity method investments companies	(722,307,716	)	(55,314,772	)	(2,352,388,839	)	(127,465,948	)	66,427,909
Add: Equity dilution impact	(832,336	)	11,027,933		—		(8,314,364	)	20,577,432
Add: Gain/(loss) from disposal of equity investments, including the remeasurement gain/(loss) from previously held equtiy investments in step acquisitions	—		1,369,310,070		2,352,388,839		—		100,185,800
Equity in income/(loss) of affiliates	(723,140,052	)	1,325,023,231		—		(135,780,312	)	187,191,141

			As of December 31,
	2016		2015		2014
Balance sheet data:
Current assets	1,978,681,514	3,353,714,017	9,433,080,372	4,091,410,052	1,383,806,709
Long-term assets	454,710,971	17,298,415,142	1,072,464,782	10,102,034,376	9,377,157,121
Current liabilities.	1,687,293,575	11,595,906,780	10,442,341,153	4,043,523,264	1,771,565,291
Long-term liabilities.	15,970,032	1,650,938,946	93,019,969	466,730,372	3,549,170,630
Non-controlling interests.	15,512,748	1,944,540,518	5,282,358	76,928,317	15,188,000

Other-Cost method investments

The available-for-sale equity securities without readily determinable fair value are measured at cost. The carrying value of cost method investments was RMB 1 billion and RMB 0.9 billion as of December 31, 2015 and 2016 respectively. None of the investments individually is considered as material to the Group’s financial position.

In February 2016, the Company consummated a transaction to sell all its held 4% equity interest of Keystone, which was accounted for under cost method with the carrying value of RMB 167 million, to a third party institution for a total consideration of US$48 million (approximately RMB 316 million) which resulted in a gain of RMB 149 million as reported in “Other income/ (expense)” (Note 2).

FAIR VALUE MEASUREMENT

12 Months Ended

Dec. 31, 2016

FAIR VALUE MEASUREMENT

FAIR VALUE MEASUREMENT

9. FAIR VALUE MEASUREMENT

In accordance with ASC 820-10, the Company measures financial products, time deposits and available-for-sale investments at fair value on a recurring basis. Available-for-sale investments classified within Level 1 are valued using quoted market prices that currently available on a securities exchange registered with the Securities and Exchange Commission (SEC) and Shanghai Stock Exchange (SSE). Financial products and time deposits classified within Level 2 are valued using directly or indirectly observable inputs in the market place. The available-for-sale investments classified within Level 3 are valued based on a model utilizing unobservable inputs which require significant management judgment and estimation.

Assets measured at fair value on a recurring basis are summarized below:

	Fair Value Measurement at December 31, 2015 Using
	Quoted Prices in Active Market for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Unobservable inputs (Level 3)	Fair Value at December 31, 2015
	RMB	RMB	RMB	RMB	US$
Financial products	—	7,937,009,389	—	7,937,009,389	1,225,263,112
Time deposits	—	1,153,526,819	—	1,153,526,819	178,073,855
Available-for-sale investments
Tujia	—	—	2,876,749,196	2,876,749,196	444,093,550
LY.com	—	—	1,745,309,616	1,745,309,616	269,429,377
Hanting	1,116,231,309	—	—	1,116,231,309	172,316,421
eHi	793,869,127	—	—	793,869,127	122,552,275
Easy Go	—	—	527,301,676	527,301,676	81,401,352
Tuniu	430,659,093	—	—	430,659,093	66,482,308
Others	—	—	316,742,816	316,742,816	48,896,665

Total	2,340,759,529	9,090,536,208	5,466,103,304	16,897,399,041	2,608,508,915

	Fair Value Measurement at December 31, 2016 Using
	Quoted Prices in Active Market for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Unobservable inputs (Level 3)	Fair Value at December 31, 2016
	RMB	RMB	RMB	RMB	US$
Financial products	—	8,414,292,445	—	8,414,292,445	1,211,910,189
Time deposits	—	6,758,382,572	—	6,758,382,572	973,409,560
Available-for-sale investments
China Eastern Airlines	3,293,478,259	—	—	3,293,478,259	474,359,536
Tujia	—	—	3,081,585,780	3,081,585,780	443,840,671
Hanting	1,984,037,413	—	—	1,984,037,413	285,760,826
eLong	—	—	1,877,945,423	1,877,945,423	270,480,401
LY.com	—	—	1,523,436,120	1,523,436,120	219,420,441
MakeMyTrip	1,519,309,068	—	—	1,519,309,068	218,826,022
eHi	612,309,518	—	—	612,309,518	88,190,914
Tuniu	252,746,139	—	—	252,746,139	36,403,016
Easy Go	—	—	228,317,887	228,317,887	32,884,616
Others	—	—	94,311,000	94,311,000	13,583,609

Total	7,661,880,397	15,172,675,017	6,805,596,210	29,640,151,624	4,269,069,801

The roll forward of major Level 3 investments are as following:

	Tujia	eLong	LY.com		Easy Go		Others
	RMB	RMB	RMB		RMB		RMB
Fair value of Level 3 investment as at December 31, 2014	—	—	1,547,844,523		627,905,501		207,514,062
Transfer in and/or out of Level 3	2,784,302,479	—	—		—		94,928,814
Effect of exchange rate change	53,534,169	—	—		13,372,961		7,103,210
The change in fair value of the investment	38,912,548	—	197,465,093		(113,976,786	)	7,196,730

Fair value of Level 3 investment as at December 31, 2015	2,876,749,196	—	1,745,309,616		527,301,676		316,742,816

Transfer in and/or out of Level 3	—	1,778,322,045	—		—		(190,921,630	)
Disposal of investment	—	—	—		(317,261,674	)	—
Effect of exchange rate change	203,797,833	98,468,430	—		18,277,885		4,847,716
Other than temporary impairment	—	—	—		—		(36,357,902	)
The change in fair value of the investment	1,038,751	1,154,948	(221,873,496	)	—		—

Fair value of Level 3 investment as at December 31, 2016	3,081,585,780	1,877,945,423	1,523,436,120		228,317,887		94,311,000


Fair value of Level 3 investments as at December 31, 2016 (US$)	443,840,671	270,480,401	219,420,441		32,884,616		13,583,609

The Company determined the fair value of their investment by using an income approach concluding on the overall investee’s equity value and allocating this value to the various classes of preferred and common shares by using an option-pricing method. The determination of the fair value was assisted by independent appraisals, based on estimates, judgments and information of other comparable public companies. The significant unobservable inputs used in the valuation are as following:

Unobservable Input	Tujia	eLong	LY.com	Easy Go

Weighted average cost of capital	18%	14.5%	17%	28%
Terminal growth rate	3%	3%	3%	3%
Lack of marketability discount	20%	18%	15%	20%
Time to liquidation	2.8 years	5 years	3 years	2 years
Risk-free rate	3.5%	1.93%	2.74%	1.27%
Expected volatility	42%	46.1%	46%	45.2%
Probability	Liquidation scenario: 30% Redemption scenario: 30% IPO scenario: 40%	Liquidation scenario: 30% Redemption scenario: 30% IPO scenario: 40%	Liquidation scenario: 70% IPO scenario: 30%	Liquidation scenario: 60% IPO scenario: 40%
Dividend yield	Nil	Nil	Nil	Nil

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

GOODWILL

12 Months Ended

Dec. 31, 2016

GOODWILL

GOODWILL

10. GOODWILL

Goodwill, which is not tax deductible, represents the synergy effects of the business combinations. The changes in the carrying amount of goodwill for the years ended December 31, 2015 and 2016 were as follows:

	2015		2016
	RMB		RMB

Balance at beginning of year	1,892,507,708		45,690,440,903
Acquisition of Skyscanner (Note 2-“Acquisitions”)	—		9,583,716,450
Acquisition of Qunar (Note 2-“Acquisitions”)	42,980,923,491		582,240,644
Acquisition of Travelfusion (Note 2-“Acquisitions”)	687,633,024		—
Acquisition of an offline travel agency in 2014 and measurement period adjustment in 2015 (Note 2-“Acquisitions”)	945,561		—
Acquisition of a technology company focusing on hotel customer reviews in 2014 and measurement period adjustment in 2015 (Note 2-“Acquisitions”)	(33,564,000	)	—
Others	161,995,119		158,787,593

Balance at end of period	45,690,440,903		56,015,185,590

Goodwill arose from the business combinations completed in the years ended December 31, 2016 has been allocated to the single reporting unit of the Group. For the years ended December 31, 2014, 2015 and 2016, the Company did not have goodwill impairment. As of December 31, 2016, there had not been any accumulated goodwill impairment provided.

INTANGIBLE ASSETS

12 Months Ended

Dec. 31, 2016

INTANGIBLE ASSETS

INTANGIBLE ASSETS

11. INTANGIBLE ASSETS

Intangible assets as of December 31, 2015 and 2016 were as follows:

	2015		2016
	RMB		RMB
Intangible asset
Intangible assets to be amortized
Business Relationship (Representing the relationship with the travel service providers and other business partners)	878,529,857		1,815,034,491
Technology	447,515,717		696,499,639
Customer relationship	96,942,578		101,042,578
Non-compete agreements	11,479,610		11,479,610
Cross-border travel agency license	1,117,277		1,117,277
Others	17,990,000		17,990,000
Intangible assets not subject to amortization
Trade mark	9,631,703,672		11,613,475,256
Others	21,936,321		22,140,607

	11,107,215,032		14,278,779,458

Less: accumulated amortization
Intangible assets to be amortized
Business Relationship	(34,848,999	)	(175,130,119	)
Technology	(15,566,396	)	(110,511,387	)
Customer relationship	(31,250,912	)	(49,086,468	)
Non-compete agreements	(11,479,610	)	(11,479,610	)
Cross-border travel agency license	(1,117,277	)	(1,117,277	)
Others	(5,036,667	)	(6,684,666	)

	(99,299,861	)	(354,009,527	)

Net book value
Intangible assets to be amortized
Business Relationship	843,680,858		1,639,904,372
Technology	431,949,321		585,988,252
Customer relationship	65,691,666		51,956,110
Non-compete agreements	—		—
Cross-border travel agency license	—		—
Others	12,953,333		11,305,334
Intangible assets not subject to amortization
Trade mark	9,631,703,672		11,613,475,256
Others	21,936,321		22,140,607

	11,007,915,171		13,924,769,931

Finite-lived intangible assets are tested for impairment if impairment indicators arise. The Company amortizes its finite-lived intangible assets using the straight-line method:

Customer relationship		3-10 years
Business Relationship		5-10 years
Technology		5-6 years
Non-compete agreements		5 years
Cross-border travel agency license		8 years

Amortization expense for the years ended December 31, 2014, 2015 and 2016 was approximately RMB5 million, RMB58 million and RMB 255 million respectively.

The annual estimated amortization expense for intangible assets subject to amortization for the five succeeding years is as follows:

		Amortization
		RMB

2017		386,006,256
2018		385,701,422
2019		379,498,256
2020		362,549,757
2021		205,505,894

		1,719,261,585

SHORT-TERM DEBT AND CURRENT PORTION OF LONG-TERM DEBT

12 Months Ended

Dec. 31, 2016

SHORT-TERM DEBT AND CURRENT PORTION OF LONG-TERM DEBT

SHORT-TERM DEBT AND CURRENT PORTION OF LONG-TERM DEBT

12. SHORT-TERM DEBT AND CURRENT PORTION OF LONG-TERM DEBT

	2015	2016
	RMB	RMB
Short-term bank borrowings	4,544,819,828	6,668,284,614
2017 Convertible Senior Notes Due 2017 (Note 17)	324,796,892	170,867,230
2018 Convertible Senior Notes Due 2018 (Note 17)	5,182,240,000	—
Qunar CB	2,658,356,678	—
Other short-term debt	—	48,157,745

Total	12,710,213,398	6,887,309,589

As of December 31, 2016, the Group obtained one borrowing of RMB391 million (US$56.3 million) collateralized by bank deposit of RMB200 million classified as restricted cash. The annual interest rate of borrowing is approximately 1.7%.

As of December 31, 2016, the Group obtained one borrowing of RMB378 million (US$54.5 million) collateralized by short term investment of RMB400 million. The annual interest rate of borrowings is approximately 1.7%.

As of December 31, 2016, the Group obtained three borrowings of RMB868 million (US$125 million) in aggregate collateralized by bank deposits of RMB60 million classified as restricted cash. The annual interest rate of borrowings is approximately from 1.6% to 2.0%.

As of December 31, 2016, the Group obtained four borrowings of RMB1.1 billion (US$152 million) in aggregate collateralized by short-term investment of RMB580 million. The annual interest rate of borrowings is approximately 1.4%.

As of December 31, 2016, the Group obtained four borrowings of RMB250 million (US$36 million) in aggregate collateralized by bank deposits of RMB250 million classified as restricted cash. The annual interest rate of borrowings is approximately from 3.9% to 5.1%.

As of December 31, 2016, the Group obtained twenty borrowings of RMB3.7 billion (US$531.5 million) in aggregate. The annual interest rate of borrowings is approximately from 3.1% to 4.4%.

As of December 31, 2016, the Group obtained five borrowings of RMB36.3 million (EUR5.0 million) in aggregate. The annual interest rate of borrowings is approximately from 2.3% to 2.9%.

The short-term borrowings contain covenants including, among others, limitation on liens, consolidation, merger and sale of the Company’s assets. The Company is in compliance with all of the loan covenants as of December 31, 2015 and 2016.

In June 2015, Qunar issued US$ 500 million, 2% interest rate convertible senior notes due 2021 (the “Qunar CB”) to several institutional investors (the “CB Holders”). The Qunar CB included a Make-Whole provision, where the CB Holders were granted a right to convert the Qunar CB into Qunar’s ADS at an increased conversion rate (the “Make-Whole Rate”) or request redemption at an equivalent dollar amount in the event of certain fundamental changes of Qunar, including change in shareholding over 10%. In October 2015, Ctrip obtained 45% equity interest of Qunar from Baidu which triggered the Make-Whole provision. In December 2015, Ctrip entered into agreements with the CB Holders to settle all the outstanding Qunar CB at a consideration equal to the value of Qunar ADS as if were converted at the Make-Whole Rate. The total consideration included US$ 314 million (Rmb 2,033 million) in cash and 1,044,805 ordinary shares of Ctrip with the aggregated amount of RMB4.5 billion. Such liability of Qunar CB is considered as assumed liability by the Company for Qunar and was charged in pre-acquisition of Qunar. This Make-Whole provision is included in other payables and accruals. The settlement was paid in January 2016.

As of December 31, 2015 and 2016, RMB 325 million (US$50 million) and RMB 171 million of 2017 Notes is classified as short-term debt to present that the 2017 Notes may be redeemed or mature within one year. As of December 31, 2015, RMB 5.2 billion (US$800 million) of 2018 Notes was reclassified as short-term debt because the 2018 Notes holders had a non-contingent option to require the Company to repurchase for cash all or any portion of their 2018 Notes on October 15, 2016. The holders did not exercise that option and it expired and the 2018 Notes were reclassified to non-current at December 31, 2016 as they do not mature until 2018.

RELATED PARTY TRANSACTIONS AND BALANCES

12 Months Ended

Dec. 31, 2016

RELATED PARTY TRANSACTIONS AND BALANCES

13. RELATED PARTY TRANSACTIONS AND BALANCES

During the years ended December 31, 2014, 2015 and 2016 significant related party transactions were as follows:

	2014	2015	2016
	RMB	RMB	RMB
Commissions from eLong (a)	—	7,191,870	261,139,916
Commissions from Homeinns (a)	38,139,325	34,556,539	66,921,837
Commissions from Hanting (a)	19,234,632	17,740,390	44,094,542
Commissions from Tujia (a)	—	5,967,489	6,023,389
Entrusted loan and interest to a technology company focusing on hotel customer reviews (b)	694,577	—	—
Repayment of entrusted loan and interest from Baidu (c)	—	—	652,299,803
Shareholders’ loan and interest to Skyseas (d)	505,955,950	15,826,363	73,399,675
Commissions to eLong (e)	—	9,532,316	85,780,819
Commissions to LY.com (e)	76,093,733	75,297,659	62,150,144
Commissions to Baidu (e)	—	—	96,056,853
Online marketing service from Baidu (f)	—	89,244,042	110,064,311
Online marketing service from Hanting (f)	—	—	13,000,000
Repayment of entrusted loan and interest to Baidu (g)	—	—	1,837,384,234
Purchase of tour package from Ananda Travel Service (Aust.) Pty Limited (“Ananda”) (h)	27,197,283	11,351,388	12,714,298

(a)

Homeinns, Hanting, eLong and Tujia, have entered into agreements with the Company, respectively, to provide hotel rooms for our customers. The transactions above represent the commissions earned from these related parties.

(b)

In September 2013, the Company entered into agreements with a technology company focusing on hotel customer reviews to provide entrusted loan of RMB13 million. The entrusted loan has a one-year maturity period. The balance of entrusted loan together with the interest to the technology company focusing on hotel customer reviews for the year ended December 31, 2014 is presented as above.

(c)

On October 27, 2015, Qunar granted a loan amounting to RMB650 million (US$100 million) to Baidu. The loan bore an interest at 1.00% with a repayment term of 12 months. Qunar received the repayment in March, 2016.

(d)

In 2014, the Company provided a shareholder’s loan of US$80 million to Skyseas. The interest rate is 3% per annum currently and shall be subject to annual review and adjustment with mutual consent. The loan is guaranteed by a vessel mortgage and shall be paid back by installments through 2020. The balance of the loan together with the interest for the year ended December 31, 2014 and the interest for the year ended December 31, 2015 and 2016 are presented as above.

(e)

The Company entered into agreements to provide hotel rooms to eLong, LY.com and Baidu. The transactions above represent the commissions paid to these related parties.

(f)

The Company has entered into marketing service agreements with Baidu and Hanting. The transactions above represent the marketing service fee paid to these related parties.

(g)

On March 12 and May 4, 2015, Qunar drew down RMB507 million and RMB627 million respectively pursuant to the revolving credit facility agreement with Baidu. In March 2016, Qunar repaid these loans and the facility agreement was terminated. In addition, on October 26, 2015, Qunar was granted a loan amounting to RMB640 million (US$99 million) from Baidu Times. The loan bore an interest at 4.14% with a repayment term of 12 months. Qunar repaid the loan in March, 2016.

(h)

The Company’s tour package supplier, Ananda is an affiliate of Wing On Travel. Tour package purchase from Ananda for the years ended December 31, 2014, 2015 and 2016 is presented as above.

As of December 31, 2015 and 2016, significant balances with related parties were as follows:

	2015	2016
	RMB	RMB
Due from related parties, current:
Due from Baidu (a)	788,860,421	408,834,667
Due from eLong	34,515,489	132,381,883
Due from Skyseas	56,727,885	132,035,460
Due from LY.com	33,051,263	96,308,665
Due from others	48,636,400	18,043,311

	961,791,458	787,603,986


Due from related parties, non-current:
Due from Skyseas	543,911,586	599,913,241


Due to related parties, current:
Due to eLong	165,436,171	506,461,015
Due to Baidu(a)	1,891,209,753	293,579,066
Due to others	6,320,029	37,381,264

	2,062,965,953	837,421,345

(a)

On June 1, 2015, Qunar and Baidu entered into a business cooperation agreement, under which Baidu agreed to grant Qunar an exclusive right to integrate its hotel information and products into the personal computer and mobile versions of Baidu Maps. Qunar will display location-based hotel data through the Baidu Maps interface. Users can click on the displayed hotels to view hotels and to complete bookings. Qunar pays Baidu service commission at a certain percentage of gross revenue Qunar earns in exchange for the services provided by Baidu. As of December 31, 2015 and December 31, 2016, the outstanding balance related to business cooperation agreement amounted to RMB 138 million and RMB 409 million respectively.

On February 27, 2014, Qunar obtained a revolving credit facility of US$300,000,000 from Baidu. The three-year credit facility bore no commitment fee. Any drawdown bore interest at a rate of 90% of the benchmark lending rate published by the People’s Bank of China and shall be repaid within three years from the drawdown date. Qunar was allowed to repay its outstanding debt obligation at maturity either by cash or by issuance of Class B shares. The applicable share conversion price will be determined by the prevailing share price at the maturity date. On March 12 and May 4, 2015, Qunar drew down RMB507 million (US$78 million) and RMB627 million (US$97 million) respectively from the credit facility. In March 2016, Qunar repaid these loans and the facility agreement was terminated. The repayment was reported in “Repayment of loans due to related parties” in the statement of cash flow.

On October 27, 2015, Quanr granted a loan amounting to RMB650 million (US$100 million) to Baidu. The loan bore an interest at 1.00% with a repayment term of 12 months. As of December 31, 2015, the outstanding entrusted loan and interest to Baidu amounted to RMB 651 million. Qunar received the repayment in March, 2016. In connection with the loan granted to Baidu, Qunar was granted a loan amounting to RMB640 million (US$99 million) from Baidu Times. The loan bore an interest at 4.14% with a repayment term of 12 months. Qunar repaid the loan in March, 2016. The Company had evaluated both substance and form of these loans arrangements with Baidu. Given that the loan granted to Baidu is solely for the consideration the currency access to RMB and is also dependent on the receipt of the loan provided by Baidu, and also taking into account of the significant net cash in flow as a result of all the loans arrangements with Baidu during the periods, the Company believes these arrangements have the primary purpose and intent in common to finance Qunar and therefore are reported as financing activities in the statement of cash flow on a gross basis according to the forms of the arrangements.

EMPLOYEE BENEFITS	12 Months Ended
EMPLOYEE BENEFITS	Dec. 31, 2016
EMPLOYEE BENEFITS
EMPLOYEE BENEFITS	14. EMPLOYEE BENEFITS The Group’s employee benefit primarily related to the full-time employees of the PRC subsidiaries and the VIEs, including medical care, welfare subsidies, unemployment insurance and pension benefits. The PRC subsidiaries and VIEs are required to accrue for these benefits based on certain percentages of the employees’ salaries in accordance with the relevant PRC regulations and make contributions to the state-sponsored pension and medical plans out of the amounts accrued for medical and pension benefits. The PRC government is responsible for the medical benefits and ultimate pension liability to these employees. The total expenses recorded for such employee benefits amounted to RMB725 million, RMB961 million and RMB 1.4 billion for the years ended December 31, 2014, 2015 and 2016 respectively.

TAXATION

12 Months Ended

Dec. 31, 2016

TAXATION

TAXATION

15. TAXATION

Cayman Islands

Under the current laws of Cayman Islands, the Company is not subject to tax on income or capital gain. In addition, upon payments of dividends by the Company to its shareholders, no Cayman Islands withholding tax will be imposed.

Hong Kong

The Company’s subsidiaries incorporated in the Hong Kong are subject to Hong Kong Profits Tax (“CIT”) on the taxable income as reported in their respective statutory financial statements adjusted in accordance with relevant Hong Kong tax laws. The applicable tax rate is 16.5% in Hong Kong.

Taiwan

The Company’s consolidated entities registered in the Taiwan are subject to Taiwan Enterprise Income Tax on the taxable income as reported in their respective statutory financial statements adjusted in accordance with relevant Taiwan income tax laws. The applicable tax rate is 17% in Taiwan.

The PRC

The Company’s subsidiaries and VIEs registered in the PRC are subject to PRC Corporate Income Tax (“CIT”) on the taxable income as reported in their respective statutory financial statements adjusted in accordance with relevant PRC income tax laws.

The PRC CIT laws apply a general enterprise income tax rate of 25% to both foreign-invested enterprises and domestic enterprises. Preferential tax treatments are granted to enterprises, which conduct business in certain encouraged sectors and to enterprises otherwise classified as a High and New Technology Enterprise (“HNTE”). Being qualified as HNTE, Ctrip Computer Technology, Ctrip Travel Information, Ctrip Travel Network, Qunar Software and Qunar Beijing are entitled to a preferential EIT rate of 15% from 2014 to 2016 and are in the process of renewing the qualifications for HNTEs for another three years, JointWisdom is entitled to a preferential EIT rate of 15% from 2015 to 2017.

Over the years since 2012, Chengdu Ctrip, Chengdu Ctrip International and Chengdu Information obtained approval from local tax authorities to apply the 15% preferential tax rate as qualified as Enterprises falling within the Catalog of Encouraged Industries in the Western Region (“Old Catalog”). In 2014, a new Catalog of Encouraged Industries in the Western Region (“New Catalog”) has been released. Under the “New Catalog”, the subsidiaries obtained approval from local tax authorities to apply the 15% preferential rate from 2011 to 2020.

Pursuant to the PRC CIT Law, all foreign invested enterprises in the PRC are subject to the withholding tax for their earnings generated after January 1, 2008. The Company expects to indefinitely reinvest undistributed earnings generated after January 1, 2008 in the onshore PRC entities. As a result, no deferred tax liability was provided on the outside basis difference from undistributed earnings after January 1, 2008.

Income/(loss) from domestic and foreign components before income tax expenses

	2014		2015	2016
	RMB		RMB	RMB
Domestic	627,725,908		1,873,383,988	2,207,474,278
Foreign	(592,473,548	)	1,131,979,994	(3,967,579,279	)

Total	35,252,360		3,005,363,982	(1,760,105,001	)

Composition of income tax expense

The current and deferred portion of income tax expense included in the consolidated statements of income for the years ended December 31, 2014, 2015 and 2016 were as follows:

	2014		2015	2016
	RMB		RMB	RMB
Current income tax expense	228,395,153		383,723,730	454,533,605
Deferred tax (benefit)/expense	(97,573,997	)	86,464,693	23,475,428

Income tax expense	130,821,156		470,188,423	478,009,033

Income tax expense was RMB478 million (US$69 million) in the year ended December 31, 2016, increase from RMB470 million in the year ended 2015. The effective income tax rate in year ended December 31, 2016 was -27%, as compared to 16% in the year ended 2015, mainly due to the increase of non-deductible share-based compensation expenses in 2016.

Reconciliation of the differences between statutory tax rate and the effective tax rate

The reconciliation between the statutory CIT rate and the Group’s effective tax rate for the years ended December 31, 2014, 2015 and 2016 were as follows:

	2014		2015		2016
Statutory CIT rate	25	%	25	%	25	%
Tax differential from statutory rate applicable to subsidiaries with preferential tax rates	(375	)%	(5	)%	8	%
Gain on deconsolidation of a subsidiary with a withholding tax rate of 10% versus the statutory CIT rate	—		(11	)%	—
Non-deductible expenses incurred	480	%	6	%	(50	)%
Change in valuation allowance	241	%	1	%	(10	)%

Effective CIT rate	371	%	16	%	(27	)%

The change in the Group’s effective tax rates from year over year is primarily attributable to the tax differential from certain subsidiaries with preferential tax rates as well as the non-deductible expenses.

The non-deductible expenses are primarily attributable to the share based compensation charge of RMB 3.6 billion, which was not deductible according to the PRC tax laws. For the years ended December 31, 2014, 2015 and 2016, such non-deductible expense increased the income tax in the amount of RMB 124 million, RMB 161 million and RMB 890 million, respectively by using enacted tax rate of 25%, which led to the increase of effective tax rate of 352%, 5% and -51% respectively. The remaining impact from the non-deductible expenses comes from the other expenses incurred on the Company level which is also not subject to income tax.

The provisions for income taxes for the years ended December 31, 2014, 2015 and 2016 differ from the amounts computed by applying the CIT primarily due to preferential tax rate enjoyed by certain subsidiaries and VIEs of the Company as well as the gain on deconsolidation of a subsidiary which was subject to a lower withholding tax rate of 10%. The following table sets forth the effect of preferential tax on China operations:

	2014	2015	2016
	RMB	RMB	RMB
Tax holiday effect	85,036,934	162,896,542	177,799,057
Basic net income per ADS effect	0.62	1.08	0.38
Diluted net income per ADS effect	0.56	0.86	0.38

For the years ended December 31, 2014, 2015 and 2016, the impacts on effective tax rates from the Company’s major subsidiaries with preferential tax rates are as follows:

	Impact on the effective tax rates
			2014		2015		2016
Ctrip Computer Technology (Shanghai) Co., Ltd.	15	%	(74	)%	(1.4	)%	4	%
Ctrip Travel Information Technology (Shanghai) Co., Ltd.	15	%	(48	)%	(0.4	)%	2	%
Ctrip Travel Network Technology (Shanghai) Co., Ltd.	15	%	(154	)%	(3.0	)%	7	%
Chengdu Ctrip Travel Agency Co., Ltd.	15	%	(11	)%	(0.2	)%	1	%
Ctrip Hong Kong subsidiaries	16.5	%	(88	)%	(0.3	)%	1	%
Qunar and subsidiaries	15	%	—		—		(7	)%
Total			(375	)%	(5.3	)%	8	%

Significant components of deferred tax assets and liabilities:

	2015		2016
	RMB		RMB
Accrued expenses	109,784,998		149,205,615
Loss carry forward	78,771,363		159,747,175
Accrued liability for customer reward related programs	114,965,397		122,635,196
Accrued staff salary	110,263,508		55,228,349
Others	23,038,753		38,782,032
Less: Valuation allowance of deferred tax assets	(31,489,450	)	(150,286,773	)

Total deferred tax assets, non-current	405,334,569		375,311,594


Deferred tax liabilities, non-current:
Recognition of intangible assets arise from business combinations	(3,045,259,390	)	(3,607,882,808	)


Net deferred tax assets/(liabilities)	(2,639,924,821	)	(3,232,571,214	)

Movement of valuation allowances:

	2014	2015		2016
	RMB	RMB		RMB
Balance at beginning of year	86,735,795	183,449,500		31,489,450
Current year additions	96,713,705	31,590,648		118,797,323
Deconsolidation of Tujia	—	(183,550,698	)	—

Balance at end of year	183,449,500	31,489,450		150,286,773

As of December 31, 2015 and 2016, valuation allowance of RMB31 million and RMB150 million was mainly provided for operating loss carry forwards related to certain subsidiary based on then assessment where it is more likely than not that such deferred tax assets will not be realized. If events were to occur in the future that would allow us to realize more of our deferred tax assets than the presently recorded net amount, an adjustment would be made to the deferred tax assets that would increase income for the period when those events occurred.

As of December 31, 2016, the Group had net operating tax loss carry forwards amounted to RMB678 million which will expire from 2017 to 2020 if not used.

Qunar, one of the Company’s subsidiaries acts as an agent for its air travel facilitating services including aviation insurance policies (the “Aviation Insurance Arrangements”), presents revenues from such transactions on a net basis. Under the current PRC CIT Laws and regulations, Qunar’s existing business arrangement more likely than not will subject Qunar to income taxes on a gross basis for the Aviation Insurance Arrangements. The difference between the net revenue and the gross revenue is considered as deemed revenue for additional income taxes. The associated income tax expense is calculated by applying the applicable tax rate to the deemed revenue amount and includes the late payment interest based on the applicable tax rules. Such liabilities primarily represent the tax provision made with respect to the deemed revenue from these transactions. It is possible that the amount accrued will change in the next 12 months, however, an estimate of the range of the possible change cannot be made at this time.

OTHER PAYABLES AND ACCRUALS

12 Months Ended

Dec. 31, 2016

OTHER PAYABLES AND ACCRUALS

OTHER PAYABLES AND ACCRUALS

16. OTHER PAYABLES AND ACCRUALS

Components of other payables and accruals as of December 31, 2015 and 2016 were as follows:

	2015	2016
	RMB	RMB
Accrued operating expenses	1,385,818,397	1,549,809,298
Deposits received from suppliers and packaged-tour users	373,423,895	460,648,199
Due to employees for stock option proceeds received on their behalf	88,083,814	250,831,976
Payable for acquisition	125,377,844	157,004,868
Deposit for special bonus program (a)	92,206,022	168,404,481
Interest payable	84,604,548	103,016,365
Accruals for property and equipment	53,582,762	22,855,856
Deferred revenue	18,235,219	12,664,375
Advances received for a potential investment disposal	—	17,665,162
Payable for Qunar CB holders (b)	1,233,185,395	—
Others	106,649,754	106,920,667

Total	3,561,167,650	2,849,821,247

(a)

In September, 2014, the Company established a special bonus program. Under this program, the Company provides the bonus units to the selected employees and the employees are required to provide deposit to participate such program. The bonus is calculated based on certain agreed-upon performance merits and is paid together with the deposit. As of December 31, 2016, the Company recognized the employees deposit of RMB168 million in other payable.

(b)

In June 2015, Qunar issued US$ 500 million, 2% interest rate convertible senior notes due 2021 (the “Qunar CB”) to several institutional investors (the “CB Holders”). The Qunar CB included a Make-Whole provision, where the CB Holders are granted a right to convert the Qunar CB into Qunar’s ADS at an increased conversion rate (the “Make-Whole Rate”) or request redemption at an equivalent dollar amount in the event of certain fundamental changes of Qunar, including change in shareholding over 10%. In October 2015, Ctrip obtained 45% equity interest of Qunar from Baidu which triggered the Make-Whole provision. In December 2015, Ctrip entered into the agreements with the CB Holders to settle all the outstanding Qunar CB in the consideration equal to the value of Qunar ADS as if were converted at the Make-Whole Rate. The total consideration included cash and the ordinary shares of Ctrip with the aggregated amount of RMB4.5billion. Such liability of Qunar CB is considered as assumed liability at the Company for Qunar and was charged in pre-acquisition of Qunar. The settlement was paid in January 2016.

LONG-TERM DEBT

12 Months Ended

Dec. 31, 2016

LONG-TERM DEBT

LONG-TERM DEBT

17.LONG-TERM DEBT

	2015		2016
	RMB		RMB
2018 1.25% Convertible Senior Notes	—		5,554,400,000
2020 1% Convertible Senior Notes	4,534,460,000		4,860,100,000
2025 1.99% Convertible Senior Notes	2,591,120,000		2,777,200,000
2022 1.25% Convertible Senior Notes	—		6,769,425,000
Priceline 1% Convertible 2019 Notes	3,238,900,000		3,471,500,000
Priceline 1% Convertible 2020 Notes	1,619,450,000		1,735,750,000
Priceline 2% Convertible 2025 Notes	3,238,900,000		3,471,500,000
Priceline 1.25% Convertible 2022 Notes	—		173,575,000
Hillhouse 2% 2025 Convertible Notes	3,238,900,000		3,471,500,000
Long-term loan	—		2,550,000,000
Less: Debt issuance cost	(107,121,740	)	(184,276,447	)

Total	18,354,608,260		34,650,673,553

As of December 31, 2016, the fair value of the Company’s long term notes, based on Level 2 inputs, was US$4.7 billion (RMB32.3 billion).

Description of 2017 Convertible Senior Notes

On September 24, 2012, the Company issued US$180 million in aggregate principle amount of 0.5% Convertible Senior Notes due 2017 (the “2017 Notes”) at par. The 2017 Notes may be converted, at each holder’s option, at an initial conversion rate of 51.7116 American depository shares (“ADSs”) per US$1,000 principal amount of the 2017 Notes (which represents an initial conversion price of US$19.34 per ADS) at any time prior to the close of business on the second business day immediately preceding the maturity date of September 15, 2017. Debt issuance costs were US$5.4 million and are being amortized to interest expense to the put date of the 2017 Notes (September 15, 2015).

Absent a fundamental change (as defined in the indenture for the 2017 Notes), each holder of the 2017 Notes has a right at such holder’s option to require the Company to repurchase for cash all or any portion of such holder’s 2017 Notes on September 15, 2015. If a fundamental change (as defined in the indenture for the 2017 Notes) occurs at any time, each holder has a right at such holder’s option to require the Company to repurchase for cash all or any portion of such holder’s 2017 Notes on the date notified in writing by the Company in accordance with the indenture for the 2017 Notes. The Company believes that the likelihood of occurrence of events considered a fundamental change is remote. The 2017 Notes are not redeemable prior to the maturity date of September 15, 2017.

Concurrently with the issuance of the 2017 Notes, the Company purchased a call option (“2012 Purchased Call Option”) and sold warrants (“2012 Sold Warrants”), where the counterparty agreed to sell to the Company up to approximately 9.3 million of the Company’s ADSs at a price of US$19.34 per ADS upon the Company’s exercise of the 2012 Purchased Call Option and the Company received US$26.6 million from the same counterparty for the sale of warrants to purchase up to approximately 9.3 million of the Company’s ADSs at an exercise price of US$26.37 per ADS. The 2012 Purchased Call Option transaction may generally reduce the potential future economic dilution associated with any conversion of the 2017 Notes, and is separate from the 2012 Sold Warrants transaction, which may have a dilutive effect on our earnings per ordinary share under certain circumstances. As of December 31, 2016, the 2012 Sold Warrants were not exercised and remained outstanding.

The Company offered an inducement to the holders of the public tranche of the 2017 Notes to convert their 2017 Notes early. The inducement provided a cash incentive of 1.5%-2.0% in 2013 in addition to the conversion ratio under the indenture for the 2017 Notes. As a result of the inducement, for years ended December 31, 2015 and 2016, US$18.9 million and US$25.5 million (RMB 167 million) of the 2017 Notes was tendered for 1 million and 2.6 million ADSs, respectively, at the initial conversion rate of 51.7116 ADS per US$1,000 principal amount of the 2017 Notes. Such early conversion of the 2017 Notes also resulted in an early termination of the 2012 Purchased Call Option, from which the Company has received US$11.6 million.

Description of 2018 Convertible Senior Notes

On October 17, 2013, the Company issued US$800 million in aggregate principle amount of 1.25% Convertible Senior Notes due 2018 (the “2018 Notes”) at par. The 2018 Notes may be converted, at each holder’s option, at an initial conversion rate of 12.7568 ADSs per US$1,000 principal amount of the 2018 Notes (which represents an initial conversion price of US$78.39 per ADS) at any time prior to the close of business on the second business day immediately preceding the maturity date of October 15, 2018. Debt issuance costs were US$19.6 million and are being amortized to interest expense to the put date of the 2018 Notes (October 15, 2016).

Absent a fundamental change (as defined in the indenture for the 2018 Notes), each holder of the 2018 Notes has a right at such holder’s option to require the Company to repurchase for cash all or any portion of such holder’s 2018 Notes on October 15, 2016. As a result of this option the 2018 Notes were classified as current liability as at December 31, 2015. The holders did not exercise that option and it expired and the 2018 Notes were reclassified to non-current liability as at December 31, 2016 as they do not mature until 2018. If a fundamental change (as defined in the indenture for the 2018 Notes) occurs at any time, each holder has a right at such holder’s option to require the Company to repurchase for cash all or any portion of such holder’s 2018 Notes on the date notified in writing by the Company in accordance with the indenture for the 2018 Notes. The Company believes that the likelihood of occurrence of events considered a fundamental change is remote. The 2018 Notes are not redeemable prior to the maturity date of October 15, 2018.

Concurrently with the issuance of the 2018 Notes, the Company purchased a call option (“2013 Purchased Call Option”) and sold warrants (“2013 Sold Warrants”) where the counterparty agreed to sell to the Company up to approximately 10.2 million of the Company’s ADSs at a price of US$78.39 per ADS upon the Company’s exercise of the 2013 Purchased Call Option and the Company received US$77.2 million from the same counterparty for the sale of warrants to purchase up to approximately 10.2 million of the Company’s ADSs at an exercise price of US$96.27 per ADS. The 2013 Purchased Call Option transaction may generally reduce the potential future economic dilution associated with any conversion of the 2018 Notes, and is separate from the 2013 Sold Warrants, which may have a dilutive effect on our earnings per ordinary share under certain circumstances. As of December 31, 2016, the 2013 Sold Warrants were not exercised and remained outstanding.

Description of 2020 Convertible Senior Notes

On June 18, 2015, the Company issued US$700 million in aggregate principle amount of 1.00% Convertible Senior Notes due 2020 (the “2020 Notes”) at par. The 2020 Notes may be converted, at each holder’s option, at an initial conversion rate of 9.1942 ADSs per US$1,000 principal amount of the 2020 Notes (which represents an initial conversion price of US$108.76 per ADS) at any time prior to the close of business on the second business day immediately preceding the maturity date of July 1, 2020. Debt issuance costs were US$11.3 million and are being amortized to interest expense to the put date of the 2020 Notes (July 1, 2018).

Absent a fundamental change (as defined in the indenture for the 2020 Notes), each holder of the 2020 Notes has a right at such holder’s option to require the Company to repurchase for cash all or any portion of such holder’s 2020 Notes on July 1, 2018. If a fundamental change (as defined in the indenture for the 2020 Notes) occurs at any time, each holder has a right at such holder’s option to require the Company to repurchase for cash all or any portion of such holder’s 2020 Notes on the date notified in writing by the Company in accordance with the indenture for the 2020 Notes. The Company believes that the likelihood of occurrence of events considered a fundamental change is remote. The 2020 Notes are not redeemable prior to the maturity date of July 1, 2020.

Concurrently with the issuance of the 2020 Notes, the Company purchased a call option (“2015 Purchased Call Option”) and sold warrants (“2015 Sold Warrants”) where the counterparty agreed to sell to the Company up to approximately 6.4 million of the Company’s ADSs at a price of US$108.76 per ADS upon the Company’s exercise of the 2015 Purchased Call Option and the Company received US$84.4 million from the same counterparty for the sale of warrants to purchase up to approximately 6.4 million of the Company’s ADSs at an exercise price of US$135.02 per ADS. The 2015 Purchased Call Option transaction may generally reduce the potential future economic dilution associated with any conversion of the 2020 Notes, and is separate from the 2015 Sold Warrants transaction, which may have a dilutive effect on our earnings per ordinary share under certain circumstances. As of December 31, 2016, the 2015 Sold Warrants were not exercised and remained outstanding.

Description of 2025 Convertible Senior Notes

On June 18, 2015, the Company issued US$400 million in aggregate principle amount of 1.99% Convertible Senior Notes due 2025 (the “2025 Notes”) at par. The 2025 Notes may be converted, at each holder’s option, at an initial conversion rate of 9.3555 ADSs per US$1,000 principal amount of the 2025 Notes (which represents an initial conversion price of US$106.89 per ADS) at any time prior to the close of business on the second business day immediately preceding the maturity date of July 1, 2025. Debt issuance costs were US$6.8 million and are being amortized to interest expense to the put date of the 2025 Notes (July 1, 2020).

Absent a fundamental change (as defined in the indenture for the 2025 Notes), each holder of the 2025 Notes has a right at such holder’s option to require the Company to repurchase for cash all or any portion of such holder’s 2025 Notes on July 1, 2020. If a fundamental change (as defined in the indenture for the 2025 Notes) occurs at any time, each holder has a right at such holder’s option to require the Company to repurchase for cash all or any portion of such holder’s 2025 Notes on the date notified in writing by the Company in accordance with the indenture for the 2025 Notes. The Company believes that the likelihood of occurrence of events considered a fundamental change is remote. The 2025 Notes are generally not redeemable prior to the maturity date of July 1, 2025, except that the Company may, at its option, redeem all but not part of the 2025 Notes in accordance with the indenture for the 2025 Notes if the Company has or will become obligated to pay holders additional amount due to certain changes in tax law of the relevant jurisdiction.

Description of 2022 Convertible Senior Notes

On September 12, 2016 and September 19, 2016, the Company issued US$975 million in aggregate principle amount of 1.25% Convertible Senior Notes due 2022 (the “2022 Notes”) at par. The 2022 Notes may be converted, at each holder’s option, at an initial conversion rate of 15.2688 ADSs per US$1,000 principal amount of the 2022 Notes (which represents an initial conversion price of US$65.49 per ADS) at any time prior to the close of business on the business day immediately preceding the maturity date of September 15, 2022. Debt issuance costs were US$19 million and are being amortized to interest expense to the put date of the 2022 Notes (September 15, 2019).

Absent a fundamental change (as defined in the indenture for the 2022 Notes), each holder of the 2022 Notes has a right at such holder’s option to require the Company to repurchase for cash all or any portion of such holder’s 2022 Notes on September 15, 2019. If a fundamental change (as defined in the indenture for the 2022 Notes) occurs at any time, each holder has a right at such holder’s option to require the Company to repurchase for cash all or any portion of such holder’s 2022 Notes on the date notified in writing by the Company in accordance with the indenture for the 2022 Notes. The Company believes that the likelihood of occurrence of events considered a fundamental change is remote. The 2022 Notes are generally not redeemable prior to the maturity date of September 15, 2022, except that the Company may, at its option, redeem all but not part of the 2022 Notes in accordance with the indenture for the 2022 Notes if the Company has or will become obligated to pay holders additional amount due to certain changes in tax law of the relevant jurisdiction.

The Company assessed the 2017 Notes, 2018 Notes, 2020 Notes, 2025 Notes and 2022 Notes (collectively as “Notes”), the 2012 Purchased Call Option, 2013 Purchased Call Option and 2015 Purchased Call Option (the “Purchased Call Options”), and the 2012 Sold Warrants, 2013 Sold Warrants and 2015 Sold Warrants (the “Sold Warrants”) under ASC 815 and concluded that:

In accordance with ASC 815-10-15, the Notes, the Purchased Call Options and the Sold Warrants (1) do not entail the same risks as the Notes involve interest, credit and equity risks, whereas the Purchased Call Options and Sold Warrants transactions were intended to reduce the equity dilution risk for the Company; and (2) have a valid business purpose and economic need for structuring the transactions separately as the Company wanted to mitigate future dilution upon conversion of the Notes, as such required that the Purchased Call Options are American style options which are physical settled whereas the Sold Warrants are European style instruments that allow net share settlement or cash settlement at the choice of the Company. Therefore, the offering of the Notes, the Purchased Call Options and Sold Warrants transactions should be accounted for as separate transactions;

The repurchase option is assessed in accordance with ASC 815-15-25-42. The repurchase option is considered clearly and closely related to its debt host and does not meet the requirement for bifurcation as the Notes were issued at par and the repurchase feature requires the issuer to settle the option by delivering par plus accrued and unpaid interest, the Notes holder would recover all of their initial investment. Additionally, since the 2017 Notes holder can only recover its initial investment upon exercise of its option, there are no interest rate scenarios under which the embedded derivative would at least double the investor’s initial rate of return;

Since the Holders can only recover its initial investment upon exercise of its repurchase option, there are no interest rate scenarios under which the embedded derivative would at least double the investor’s initial rate of return.

Therefore, the embedded repurchase feature (put option) is considered clearly and closely related to the debt host pursuant to ASC 815-15-25-1 and does not meet the requirements for bifurcation;

In accordance with ASC 815-10-15-83, the conversion option meets the definition of a derivative. However, bifurcation of conversion option from the Notes is not required as the scope exception prescribed in ASC 815-10-15-74 is met as the conversion option is considered indexed to the entity’s own stock and classified in stockholders’ equity;

As the conversion options are not bifurcated, the Company has assessed the beneficial conversion feature (“BCF”), as of commitment date as defined in ASC 470-20. There was no BCF attribute to the Notes as the set conversion prices for the Notes were greater than the respective fair values of the ordinary share price at date of issuances;

The Holders have the option to convert upon a fundamental change. If Holders decide to convert in connection with a fundamental change; the number of ADSs issuable upon conversion may be increased. The Company will have to assess for the contingent BCF using a measurement date upon issuance of the 2018 Notes, upon occurrence of such adjustment. The settlement of the conversion is based on a make-whole provision resulting from a fundamental change, this feature is consistent with ASC 815-40-55-46 (example 19), therefore the Company concludes that this feature is also considered indexed to its own stock;

Therefore, the Company has accounted for the respective Notes in accordance with ASC 470, as a single instruments as a long-term debt. The debt issuance cost were recorded as reduction to the long term debts and are amortised as interest expenses using the effective interest method. The value of the Notes are measured by the cash received.

In accordance with ASC 815-10-15-83, the Purchased Call Options meet the definition of a derivative instrument. However, the scope exception in accordance with ASC 815-10-15-74 applies to the Purchased Call Options as they are indexed to their own stock, and the Purchased Call Options meet the requirements of ASC 815 and would be classified in stockholders’ equity, therefore, the costs paid for the Purchased Call Options were accounted for within stockholders’ equity, and subsequent changes in fair value will not be recorded.

The Company assessed that the Sold Warrants are not liabilities within scope of ASC 480-10-25. The Sold Warrants are legally detachable from the Notes and the Purchased Call Options and separately exercisable as such meets the definition of a freestanding derivative instrument pursuant to ASC 815. However, the scope exception in accordance with ASC 815-10-15-74 applies to Sold Warrants and they meet the requirements of ASC 815 that would be classified in stockholders’ equity. Therefore, the Sold Warrants were initially accounted for within stockholders’ equity, and subsequent changes in fair value will not be recorded.

Description of Priceline and Hillhouse Notes

On August 7, 2014, the Company issued Convertible Senior Note (the “Priceline 2019 Note”) at an aggregate principal amount of US$500 million to an indirect subsidiary of the Priceline Group. The Priceline 2019 Note is due on August 7, 2019 and bears interest of 1% per annum, which will be paid semi-annually beginning on February 7, 2015. The Priceline 2019 Note will be convertible into the Company’s ADSs with an initial conversion price of approximately US$81.36 per ADS.

On May 26, 2015, the Company issued Convertible Senior Note (the “Priceline 2020 Note”) at an aggregate principal amount of US$250 million to an indirect subsidiary of the Priceline Group. The Priceline 2020 Note is due on May 29, 2020 and bears interest of 1% per annum, which will be paid semi-annually beginning on November 29, 2016. The Priceline 2020 Note will be convertible into the Company’s ADSs with an initial conversion price of approximately US$104.27 per ADS.

On December 10, 2015, the Company issued Convertible Senior Notes at an aggregate principal amount of US$1 billion to an indirect subsidiary of the Priceline Group and two affiliates of Hillhouse (the “2025 Priceline and Hillhouse Notes”). The 2025 Priceline and Hillhouse Notes are due on December 11, 2025 and bear interest of 2% per annum, which will be paid semi-annually beginning on June 11, 2016. The 2025 Priceline and Hillhouse Notes will be convertible into the Company’s ADSs with an initial conversion price of approximately US$68.46 per ADS.

On September 12, 2016, the Company issued US$25 million Convertible Senior Note to an indirect subsidiary of the Priceline Group (the “2022 Priceline Note”). The 2022 Priceline Note is due on September 15, 2022 and bears interest of 1.25% per annum, which will be paid semi-annually beginning on March 15, 2017. The 2022 Priceline Note will be convertible into the Company’s ADSs with an initial conversion price of approximately US$65.49 per ADS.

The Company has accounted for the above notes in accordance with ASC 470, as a single instrument within the consolidated financial statements. The value of the above notes is measured by the cash received. The Company recorded the interest expenses according to its annual interest rate.

The Company has assessed the BCF of the above notes, as of commitment date as defined in ASC 470-20. There was no BCF attribute to the above notes as the set conversion price for the above notes was greater than the fair value of the ADS price at date of issuance.

In addition, the Company has granted the Priceline Group permission to acquire the Company’s ADSs in the open market over the next twelve months, so that when combined with the ADSs convertible under the applicable notes, the Priceline Group may hold up to 15% of the Company’s outstanding ADSs subject to certain contractual carve-outs. As the potential purchases may be made at market prices, there is no accounting implication.

Long-term Loans from Commercial Banks

As of December 31, 2016, the Group obtained twelve borrowing of RMB1.7 billion (US$244.9 million) in aggregate collateralized by stock at one of the Company’s wholly-owned subsidiaries from commercial banks in China. The annual interest rate of borrowings is approximately 4.4%.

As of December 31, 2016, the Group obtained six borrowing of RMB850 million (US$122.4 million) in aggregate guaranteed by one of the Company’s wholly-owned subsidiaries from commercial banks in China. The annual interest rate of borrowings is approximately 4.3%.

CAPITAL AND TREASURY STOCK	12 Months Ended
CAPITAL AND TREASURY STOCK	Dec. 31, 2016
CAPITAL AND TREASURY STOCK
CAPITAL AND TREASURY STOCK	18. CAPITAL AND TREASURY STOCK In 2014, 2015 and 2016, US$61.6 million, US$16.5 million and US$21.6 million convertible senior notes issued in 2012 were early converted and 846,131 shares, 244,466 shares and 330,048 shares of repurchased treasury stock were delivered to the notes holders, respectively. As of December 31, 2016, the Company had 3,247,309 shares treasury stock at total cost of US$322 million. In September 2016, the Company completed the public offering of an aggregate of 32,775,000 ADSs, or the 2016 ADS Offering, including 4,275,000 ADSs in connection with the underwriters’ exercise of over-allotment option, at US$45.96 per ADS, for an aggregate offering price of approximately US$1.5 billion. Concurrently with the 2016 ADS Offering, the Company issued ordinary shares with the respective subsidiaries of Baidu, Inc., or Baidu, and Priceline Group Inc., or Priceline, at US$45.96 per ADS, at an aggregate investment amount of US$100 million and US$25 million, respectively. The issuance cost incurred for the above offerings with amount of RMB226 million was presented as reduction to the offering proceeds.

NON-CONTROLLING INTERESTS

12 Months Ended

Dec. 31, 2016

NON-CONTROLLING INTERESTS

NON-CONTROLLING INTERESTS

19.NON-CONTROLLING INTERESTS

Non-controlling interests include the common shares in the consolidated subsidiaries or VIE subsidiaries and preferred shares issued by the Company’s subsidiaries. The balance is summarized as follows:

	2015	2016


Qunar and subsidiaries	17,855,897,129	2,197,375,082
An offline travel agency	455,614,677	454,550,413
Skyscanner	—	315,836,071
Travelfusion	289,875,458	315,803,463
A technology company focusing on hotel customer reviews	262,762,132	285,110,984
An online trip package service provider	134,586,452	133,004,201
Others	135,462,399	282,237,578

	19,134,198,247	3,983,917,792

EARNINGS/(LOSSES) PER SHARE

12 Months Ended

Dec. 31, 2016

EARNINGS/(LOSSES) PER SHARE

EARNINGS/(LOSSES) PER SHARE

20. EARNINGS/(LOSSES) PER SHARE

Basic earnings/(loss) per share and diluted earnings per share were calculated as follows:

	2014	2015	2016
	RMB	RMB	RMB
Numerator:
Net income/(loss) attributable to Ctrip’s shareholders	242,739,781	2,507,655,884	(1,430,703,195	)
Eliminate the dilutive effect of interest expense of convertible notes	—	185,589,773	—

Numerator for diluted earnings/(loss) per share	242,739,781	2,693,245,657	(1,430,703,195	)


Denominator:
Denominator for basic earnings/(loss) per ordinary share — weighted average ordinary shares outstanding	34,289,170	37,797,698	59,166,582
Dilutive effect of share options	3,106,496	2,962,481	—
Dilutive effect of convertible notes	—	6,102,417	—
Dilutive effect of convertible notes sold warrants	812,192	512,652	—

Denominator for diluted earnings/(loss) per ordinary share	38,207,858	47,375,248	59,166,582


Basic earnings/(loss) per ordinary share	7.08	66.34	(24.18	)

Diluted earnings/(loss) per ordinary share	6.35	56.85	(24.18	)


Basic earnings/(loss) per ADS	0.88	8.29	(3.02	)

Diluted earnings/(loss) per ADS	0.79	7.11	(3.02	)

All the convertible senior notes had anti-dilutive impact and were excluded in the computation of diluted EPS in 2016, given the loss reported. The 2025 Notes and the 2025 Priceline Notes were not included in the computation of diluted EPS in 2015 because the inclusion of such instrument would be anti-dilutive. The 2017 and 2018 Notes and the 2019 Priceline Notes were not included in the computation of diluted EPS in 2014 because the inclusion of such instrument would be anti-dilutive.

For the years ended December 31, 2014, 2015 and 2016, the Company had securities which could potentially dilute basic earnings per share in the future, which were excluded from the computation of diluted earnings/(loss) per share as their effects would have been anti-dilutive. Such weighted average numbers of ordinary shares outstanding are as following:

	2014	2015	2016


2017 convertible senior notes	1,587,142	—	435,248
2018 convertible senior notes	2,551,346	—	2,551,360
2020 convertible senior notes	—	—	1,608,985
2025 convertible senior notes	—	486,999	935,550
2022 convertible senior notes	—	—	559,282
Priceline convertible 2019 notes	614,535	—	1,536,338
Priceline convertible 2020 notes	—	—	599,400
Priceline convertible 2025 notes	—	50,023	912,919
Priceline convertible 2022 notes	—	—	14,341
A long-term equity investment firm notes	—	50,023	912,919
Outstanding weighted average stock options	74,104	64,074	3,678,030
Sold Warrants	1,996,407	1,734,865	303,176

	6,823,534	2,385,984	14,047,548

COMMITMENTS AND CONTINGENCIES

12 Months Ended

Dec. 31, 2016

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

21. COMMITMENTS AND CONTINGENCIES

Operating lease commitments

The Company has entered into leasing arrangements relating to office premises that are classified as operating leases for the periods from 2017 to 2021. Future minimum lease payments for non-cancelable operating leases are as follows:

		Office Premises
		RMB
2017		169,718,510
2018		51,750,674
2019		20,189,854
2020		6,169,875
2021		3,915,262
Thereafter		19,472,555

		271,216,730

Rental expense amounted to RMB144 million, RMB134 million and RMB378 million for the years ended December 31, 2014, 2015 and 2016, respectively. Rental expense is charged to the statements of income and comprehensive income when incurred.

Capital commitments

As of December 31, 2016, the Company had outstanding capital commitments totaling RMB2 million, which consisted of capital expenditures of property, equipment and software.

Guarantee

In connection with our air ticketing business, the Group is required by Civil Aviation Administration of China, International Air Transport Association, and local airline companies to pay deposits in order to or to provide other guarantees obtain blank air tickets. As of December 31, 2016, the amount under these guarantee arrangements was approximately RMB906 million.

Based on historical experience and information currently available, we do not believe that it is probable that we will be required to pay any amount under these guarantee arrangements. Therefore, we have not recorded any liability beyond what is required in connection with these guarantee arrangements.

Contingencies

The Company is not currently a party to any pending material litigation or other legal proceeding or claims.

The Company is incorporated in Cayman Islands and is considered as a foreign entity under PRC laws. Due to the restrictions on foreign ownership of the air-ticketing, travel agency, advertising and internet content provision businesses, the Company conducts these businesses partly through various VIEs. These VIEs hold the licenses and approvals that are essential for the Company’s business operations. In the opinion of the Company’s PRC legal counsel, the current ownership structures and the contractual arrangements with these VIEs and their shareholders as well as the operations of these VIEs are in compliance with all existing PRC laws, rules and regulations. However, there may be changes and other developments in PRC laws and regulations. Accordingly, the Company cannot be assured that PRC government authorities will not take a view in the future contrary to the opinion of the Company’s PRC legal counsel. If the current ownership structures of the Company and its contractual arrangements with VIEs were found to be in violation of any existing or future PRC laws or regulations, the Company may be required to restructure its ownership structure and operations in China to comply with changing and new Chinese laws and regulations.

PRINCIPAL ACCOUNTING POLICIES (Policies)

12 Months Ended

Dec. 31, 2016

PRINCIPAL ACCOUNTING POLICIES

Basis of presentation

The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“US GAAP”).

Consolidation

The following is a summary of the Company’s major VIEs and VIEs’ subsidiaries:

Name of VIE and VIEs’ subsidiaries		Date of establishment/acquisition

Shanghai Ctrip Commerce Co., Ltd. (“Shanghai Ctrip Commerce”)		Established on July 18, 2000
Beijing Ctrip International Travel Agency Co., Ltd. (“Beijing Ctrip”)		Acquired on January 15, 2002
Guangzhou Ctrip International Travel Agency Co., Ltd. (“Guangzhou Ctrip”)		Established on April 28, 2003
Shanghai Ctrip International Travel Agency Co., Ltd. (“Shanghai Ctrip”, formerly known as Shanghai Ctrip Charming International Travel Agency Co., Ltd.)		Acquired on September 23, 2003
Shenzhen Ctrip Travel Agency Co., Ltd. (“Shenzhen Ctrip”)		Established on April 13, 2004
Ctrip Insurance Agency Co., Ltd. (“Ctrip Insurance”)		Established on July 25, 2011
Shanghai Huacheng Southwest International Travel Agency Co., Ltd. (“Shanghai Huacheng”, formerly known as Shanghai Huacheng Southwest Travel Agency Co., Ltd.)		Established on March 13, 2001
Chengdu Ctrip Travel Agency Co., Ltd. (“Chengdu Ctrip”)		Established on January 8, 2007
Chengdu Ctrip International Travel Agency Co., Ltd. (“Chengdu Ctrip International”)		Established on November 4, 2008
Beijing Qu Na Information Technology Company Limited (“Qunar Beijing”)		Established on March 17, 2006

Major variable interest entities and their subsidiaries

Details of certain key agreements with the VIEs are as follows:

Risks in relation to contractual arrangements between the Company’s PRC subsidiaries and its affiliated Chinese entities:

Summary financial information of the Group’s VIEs in the consolidated financial statements

	As of December 31,
	2015		2016
	RMB		RMB
Total assets	22,188,424,951		30,544,580,876
Less: Inter-company receivables	(3,808,937,898	)	(2,050,819,348	)
Total assets excluding inter-company	18,379,487,053		28,493,761,528
Total liabilities	20,998,061,568		29,101,732,239
Less: Inter-company payables	(8,572,648,210	)	(15,904,065,265	)
Total liabilities excluding inter-company	12,425,413,358		13,197,666,974

The following table set forth the summary of results of operations of the VIEs and their subsidiaries of the Company:

	For the year ended December 31,
	2014		2015		2016
	RMB		RMB		RMB
Net revenues	4,138,380,618		6,384,556,234		8,706,139,377
Cost of revenues	1,252,538,920		1,983,511,461		2,442,997,433
Net income / (loss)	(87,193,139	)	(73,523,163	)	100,653,423

The amount of service fees paid by all the VIEs as a percentage of the VIEs’ total net income were 109.4%, 107.1% and 96.3% for the years ended December 31, 2014, 2015 and 2016, respectively.

The following tables set forth the summary of cash flow activities of the VIEs and their subsidiaries of the Company:

	For the year ended December 31,
	2014	2015	2016
	RMB	RMB	RMB
Net cash provided by operating activities	1,052,138,839	160,298,446	7,190,925,721
Net cash used in investing activities	—	—	—
Net cash provided by financing activities	—	—	—

Foreign currencies

Cash and cash equivalents

Restricted cash

Short-term investments

Long term loan receivable

Land use rights

Property, equipment and software

Building		20-40 years
Leasehold improvements		Lesser of the term of the lease or the estimated useful lives of the assets
Website-related equipment		5 years
Computer equipment		3-5 years
Furniture and fixtures		3-5 years
Software		3-5 years

The Company recognizes the disposal of Property, equipment and software in general and administrative expenses.

Investments

Fair value measurement of financial instruments

The Company measures its financial assets and liabilities using inputs from the following three levels of the fair value hierarchy. The three levels are as follows:

Level 1 inputs are unadjusted quoted prices in active markets for identical assets that the management has the ability to access at the measurement date.

Business combination and Acquisitions

Business combination

Acquisitions

Skyscanner Holdings Limited (“Skyscanner”)

	RMB
Net assets (including cash acquired with amount of RMB 571 million)	265,145,209
Identifiable intangible assets — trademark and domain	1,981,771,584
Identifiable intangible assets — Supplier relationship	928,904,634
Identifiable intangible assets — IT Platform	190,737,332
Deferred tax liabilities	(620,282,710	)
Non-controlling interests	(315,836,071	)
Goodwill	9,583,716,450

Total purchase consideration	12,014,156,428

Qunar Cayman Islands Limited (“Qunar”)

Below is the summary of the fair value of acquisition cost for these acquisitions:

	RMB	US$
Fair value of previously held equity interest (1)	21,698,582,100	3,416,184,974
Consideration paid in December 2015	10,842,783,275	1,687,067,570

Total purchase cost	32,541,365,375	5,103,252,544

(1)

Which represents fair value of purchase consideration for the initial 45% equity method investment in October 2015

	RMB
Cash and cash equivalents	5,169,733,816
Advance to suppliers	1,177,437,522
Prepayments and other current assets	3,075,154,225
Long-term investments	712,967,197
Fixed assets, net	232,085,350
Other non-current assets	127,412,235
Accounts payable	(1,584,668,322	)
Taxes payable	(1,028,960,573	)
Short-term debts	(3,884,097,322	)
Accrued expenses and other current liabilities	(4,526,855,580	)
Non-current liability	(93,019,969	)
Non-controlling interests	(5,282,358	)

Net assets of Qunar acquired	(628,093,779	)
Identifiable intangible assets — trademark and domain	8,998,429,167
Identifiable intangible assets — technology and supplier network for new products*	948,347,023
Deferred tax liabilities	(2,489,866,400	)
Non-controlling interests	(17,850,614,771	)
Goodwill	43,563,164,135

Total purchase consideration	32,541,365,375

In thousands	2014		2015
	RMB		RMB
Pro-forma net revenues	8,917,279		14,812,533
Pro-forma net loss	(1,889,396	)	(5,086,934	)

Travelfusion Limited (“Travelfusion”)

	RMB
Net assets	36,936,493
Identifiable intangible assets — trademark and domain	78,058,071
Identifiable intangible assets — Business relationship	261,146,660
Identifiable intangible assets — IT Platform	5,051,377
Deferred tax liabilities	(72,293,783	)
Non-controlling interests	(275,995,802	)
Goodwill	687,633,024

Total purchase consideration	720,536,040

A technology company focusing on hotel customer reviews

	RMB
Net assets	2,134,170
Identifiable intangible assets — System, brand and customer relationship	44,752,000
Deferred tax liabilities	(11,188,000	)
Goodwill	333,320,722
Fair value of previously held equity interest	(129,360,000	)

Total purchase consideration	239,658,892

An offline travel agency

	RMB
Net assets (including the cash acquired of RMB142 million)	164,411,042
Identifiable intangible assets — customer relationship	67,000,000
Identifiable intangible assets — trademark	174,800,000
Deferred tax liabilities	(60,450,000	)
Non-controlling interests	(370,656,000	)
Goodwill	331,615,519

Total purchase consideration	306,720,561

Goodwill and other intangible assets

The Company reviews intangible assets with indefinite lives annually for impairment.

No impairment on other intangible assets was recognized for the years ended December 31, 2014, 2015 and 2016.

Impairment of long-lived assets

Accrued liability for customer reward program

Deferred revenue

Revenue recognition

Accommodation reservation services

Transportation ticketing services

Packaged-tour

Corporate travel

Other businesses

Other businesses comprise primarily of online advertising services, the sale of Property Management System (“PMS”), and related maintenance service.

Allowance for doubtful accounts

	2014		2015		2016
	RMB		RMB		RMB
Balance at beginning of year	5,896,903		14,707,184		38,237,658
Provision for doubtful accounts	11,737,580		32,080,786		32,339,617
Write-offs	(2,927,299	)	(8,550,312	)	(11,735,449	)

Balance at end of period	14,707,184		38,237,658		58,841,826

Cost of revenues

Product development

Sales and marketing

Share-based compensation

Share incentive plans of Ctrip (excluding Qunar)

A summary of option activity under the share incentive plans

The following table summarized the Company’s share option activity under all the option plans (in US$, except shares):

	Number of Shares		Weighted Average Exercise Price	Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding at December 31, 2013	4,130,732		70.42	4.99	528,988,489

Granted	1,472,449		172.56
Exercised	(573,351	)	62.52
Forfeited	(57,652	)	117.63

Outstanding at December 31, 2014	4,972,178		101.03	5.17	405,399,251

Granted	625,006		247.91
Exercised	(506,163	)	65.65
Forfeited	(85,560	)	156.32

Outstanding at December 31, 2015	5,005,461		122.00	4.77	1,244,544,670

Granted	928,002		322.20
Exercised	(368,722	)	80.70
Forfeited	(41,226	)	199.32

Outstanding at December 31, 2016	5,523,515		157.82	4.54	899,966,907

Vested and expect to vest at December 31, 2016	5,339,880		155.04	4.47	884,674,316

Exercisable at December 31, 2016	3,228,073		100.42	3.14	708,809,522

The Company’s current practice is to issue new shares to satisfy share option exercises.

The expected-to-vest options are the result of applying the pre-vesting forfeiture rate assumptions of 8% to total unvested options.

The total intrinsic value of options exercised during the years ended December 31, 2014, 2015 and 2016 were US$148million US$178 million and US$257 million, respectively.

The following table summarizes information related to outstanding and exercisable options as of December 31, 2016 (in US$, except shares):

	Outstanding			Exercisable
Range of Exercise Prices	Number of shares	Weighted-Average Exercise Price	Weighted-average Remaining Contractual Life (Years)	Number of shares	Weighted-Average Exercise Price	Weighted-average Remaining Contractual Life (Years)
35.00-58.99	677,760	38.02	0.10	677,760	38.02	0.10
59.00-77.99	1,120,518	77.12	4.01	892,716	76.46	3.98
78.00-96.99	510,008	91.52	2.19	510,008	91.52	2.19
97.00-129.99	369,445	105.01	2.71	369,445	105.01	2.71
130.00-259.99	2,845,784	236.86	6.46	778,144	185.94	5.63

	5,523,515			3,228,073

The weighted average fair value of options granted during the years ended December 31, 2014, 2015 and 2016 was US$78.10, US$109.93 and US$ 140.95 per share, respectively.

	2014	2015	2016
Risk-free interest rate	1.66%-1.75%	1.35%-1.59%	1.16%-1.66%
Expected life (years)	5.0	5.0	5.0
Expected dividend yield	0%	0%	0%
Volatility	49%-52%	49%-50%	48%-51%
Fair value of options at grant date per share	from US$74.98	from US$105.16	from US$133.85
	to US$109.57	to US$112.76	to US$141.72

The following table summarized the Company’s RSUs activities under all incentive plans (in US$, except shares):

	Number of Shares		Weighted average grant date fair value(US$)
Restricted shares
Unvested at December 31, 2013	623,424		83.60

Granted	761,514		185.40
Vested	(261,692	)	86.82
Forfeited	(64,638	)	148.02

Unvested at December 31, 2014	1,058,608		158.55

Granted	229,603		249.31
Vested	(271,683	)	129.21
Forfeited	(151,120	)	181.47

Unvested at December 31, 2015	865,408		185.17

Granted	1,183,094		301.62
Vested	(492,825	)	223.00
Forfeited	(93,438	)	237.69

Unvested at December 31, 2016	1,462,239		263.28

Share incentive plans of Qunar

A summary of option activity under the share incentive plans

The following table summarized the Qunar’s share option activity under all the option plans (in US$, except shares):

	Number of Shares		Weighted Average Exercise Price	Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding at December 31, 2015	18,759,438		0.01	9.36	329,603,326

Granted	1,846,200		0.01
Exercised	(9,140,502	)	0.01
Forfeited/Cancelled	(1,575,213	)	0.01

Outstanding at December 31, 2015	9,889,923		0.01	8.54	99,393,726

Vested and expect to vest at December 31, 2016	9,241,666		0.01	8.53	92,878,743

Exercisable at December 31, 2016	2,107,686		0.01	8.52	21,182,244

The aggregate intrinsic value in the table above represents the difference between the fair value of Company’s ordinary share as at the balance sheet date and the exercise price.

The total intrinsic value of options exercised during the year ended December 31, 2016 was US$92 million.

The weighted average grant date fair value of options granted during the year ended December 31, 2016 was US$19.99.

The Company calculated the estimated fair value of share options on the date of grant using the Black-Scholes pricing model with the following assumptions for the years ended December 31, 2016:

		2016
Risk-free interest rate		0.22%-2.10%
Expected life (years)		0.13-6.00
Expected dividend yield		—
Volatility		26%-40%

Operating leases

Taxation

Other income/ (expense)

	2014		2015		2016
	RMB		RMB		RMB
Foreign exchange gains/(losses)	(55,930,392	)	12,638,982		(557,995,284	)
Bank charges	(49,713,255	)	(61,150,707	)	(101,973,794	)
Loss from impairment of long-term investment (Note 8)	(33,000,000	)	—		(47,986,882	)
Subsidy income	132,094,928		199,418,778		220,631,285
Gain on disposal of cost method investment (Note 8)	—		—		149,066,258
Gain on disposal of available-for-sale investment (Note 8)	—		—		140,651,759
Dividends from long-term investment	39,036,138		—		48,911,066
Reimbursement from the depository	—		11,582,882		46,345,221
Gain on deconsolidation of subsidiaries	789,193		2,294,451,702		252,000
Loss on disposal of a subsidiary	(1,529,046	)	—		—
Others	12,073,069		24,038,193		75,250,084

Total	43,820,635		2,480,979,830		(26,848,287	)

Statutory reserves

Dividends

Dividends are recognized when declared.

Earnings/(loss) per share

Treasury stock

Segment reporting

Recent accounting pronouncements

Certain risks and concentration

PRINCIPAL ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2016

Acquisitions disclosures

Summary of Company's major VIEs and VIE's subsidiaries

Name of VIE and VIEs’ subsidiaries		Date of establishment/acquisition

Shanghai Ctrip Commerce Co., Ltd. (“Shanghai Ctrip Commerce”)		Established on July 18, 2000
Beijing Ctrip International Travel Agency Co., Ltd. (“Beijing Ctrip”)		Acquired on January 15, 2002
Guangzhou Ctrip International Travel Agency Co., Ltd. (“Guangzhou Ctrip”)		Established on April 28, 2003
Shanghai Ctrip International Travel Agency Co., Ltd. (“Shanghai Ctrip”, formerly known as Shanghai Ctrip Charming International Travel Agency Co., Ltd.)		Acquired on September 23, 2003
Shenzhen Ctrip Travel Agency Co., Ltd. (“Shenzhen Ctrip”)		Established on April 13, 2004
Ctrip Insurance Agency Co., Ltd. (“Ctrip Insurance”)		Established on July 25, 2011
Shanghai Huacheng Southwest International Travel Agency Co., Ltd. (“Shanghai Huacheng”, formerly known as Shanghai Huacheng Southwest Travel Agency Co., Ltd.)		Established on March 13, 2001
Chengdu Ctrip Travel Agency Co., Ltd. (“Chengdu Ctrip”)		Established on January 8, 2007
Chengdu Ctrip International Travel Agency Co., Ltd. (“Chengdu Ctrip International”)		Established on November 4, 2008
Beijing Qu Na Information Technology Company Limited (“Qunar Beijing”)		Established on March 17, 2006

Summary of consolidated balance sheet information of VIEs

	As of December 31,
	2015		2016
	RMB		RMB
Total assets	22,188,424,951		30,544,580,876
Less: Inter-company receivables	(3,808,937,898	)	(2,050,819,348	)
Total assets excluding inter-company	18,379,487,053		28,493,761,528
Total liabilities	20,998,061,568		29,101,732,239
Less: Inter-company payables	(8,572,648,210	)	(15,904,065,265	)
Total liabilities excluding inter-company	12,425,413,358		13,197,666,974

Summary of consolidated results of operations information of VIEs

	For the year ended December 31,
	2014		2015		2016
	RMB		RMB		RMB
Net revenues	4,138,380,618		6,384,556,234		8,706,139,377
Cost of revenues	1,252,538,920		1,983,511,461		2,442,997,433
Net income / (loss)	(87,193,139	)	(73,523,163	)	100,653,423

Summary of consolidated results of cash flows information of VIEs

	For the year ended December 31,
	2014	2015	2016
	RMB	RMB	RMB
Net cash provided by operating activities	1,052,138,839	160,298,446	7,190,925,721
Net cash used in investing activities	—	—	—
Net cash provided by financing activities	—	—	—

Schedule of property, equipment and software estimated useful lives

Building		20-40 years
Leasehold improvements		Lesser of the term of the lease or the estimated useful lives of the assets
Website-related equipment		5 years
Computer equipment		3-5 years
Furniture and fixtures		3-5 years
Software		3-5 years

Allowance for doubtful accounts

	2014		2015		2016
	RMB		RMB		RMB
Balance at beginning of year	5,896,903		14,707,184		38,237,658
Provision for doubtful accounts	11,737,580		32,080,786		32,339,617
Write-offs	(2,927,299	)	(8,550,312	)	(11,735,449	)

Balance at end of period	14,707,184		38,237,658		58,841,826

Company's share option activity under all the incentive plans

The following table summarized the Company’s share option activity under all the option plans (in US$, except shares):

	Number of Shares		Weighted Average Exercise Price	Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding at December 31, 2013	4,130,732		70.42	4.99	528,988,489

Granted	1,472,449		172.56
Exercised	(573,351	)	62.52
Forfeited	(57,652	)	117.63

Outstanding at December 31, 2014	4,972,178		101.03	5.17	405,399,251

Granted	625,006		247.91
Exercised	(506,163	)	65.65
Forfeited	(85,560	)	156.32

Outstanding at December 31, 2015	5,005,461		122.00	4.77	1,244,544,670

Granted	928,002		322.20
Exercised	(368,722	)	80.70
Forfeited	(41,226	)	199.32

Outstanding at December 31, 2016	5,523,515		157.82	4.54	899,966,907

Vested and expect to vest at December 31, 2016	5,339,880		155.04	4.47	884,674,316

Exercisable at December 31, 2016	3,228,073		100.42	3.14	708,809,522

The following table summarizes information related to outstanding and exercisable options as of December 31, 2016 (in US$, except shares):

	Outstanding			Exercisable
Range of Exercise Prices	Number of shares	Weighted-Average Exercise Price	Weighted-average Remaining Contractual Life (Years)	Number of shares	Weighted-Average Exercise Price	Weighted-average Remaining Contractual Life (Years)
35.00-58.99	677,760	38.02	0.10	677,760	38.02	0.10
59.00-77.99	1,120,518	77.12	4.01	892,716	76.46	3.98
78.00-96.99	510,008	91.52	2.19	510,008	91.52	2.19
97.00-129.99	369,445	105.01	2.71	369,445	105.01	2.71
130.00-259.99	2,845,784	236.86	6.46	778,144	185.94	5.63

	5,523,515			3,228,073

Assumptions of Black-Scholes pricing model

	2014	2015	2016
Risk-free interest rate	1.66%-1.75%	1.35%-1.59%	1.16%-1.66%
Expected life (years)	5.0	5.0	5.0
Expected dividend yield	0%	0%	0%
Volatility	49%-52%	49%-50%	48%-51%
Fair value of options at grant date per share	from US$74.98	from US$105.16	from US$133.85
	to US$109.57	to US$112.76	to US$141.72

Schedule of restricted share activities under all option plans

The following table summarized the Company’s RSUs activities under all incentive plans (in US$, except shares):

	Number of Shares		Weighted average grant date fair value(US$)
Restricted shares
Unvested at December 31, 2013	623,424		83.60

Granted	761,514		185.40
Vested	(261,692	)	86.82
Forfeited	(64,638	)	148.02

Unvested at December 31, 2014	1,058,608		158.55

Granted	229,603		249.31
Vested	(271,683	)	129.21
Forfeited	(151,120	)	181.47

Unvested at December 31, 2015	865,408		185.17

Granted	1,183,094		301.62
Vested	(492,825	)	223.00
Forfeited	(93,438	)	237.69

Unvested at December 31, 2016	1,462,239		263.28

Summary of components of other income

	2014		2015		2016
	RMB		RMB		RMB
Foreign exchange gains/(losses)	(55,930,392	)	12,638,982		(557,995,284	)
Bank charges	(49,713,255	)	(61,150,707	)	(101,973,794	)
Loss from impairment of long-term investment (Note 8)	(33,000,000	)	—		(47,986,882	)
Subsidy income	132,094,928		199,418,778		220,631,285
Gain on disposal of cost method investment (Note 8)	—		—		149,066,258
Gain on disposal of available-for-sale investment (Note 8)	—		—		140,651,759
Dividends from long-term investment	39,036,138		—		48,911,066
Reimbursement from the depository	—		11,582,882		46,345,221
Gain on deconsolidation of subsidiaries	789,193		2,294,451,702		252,000
Loss on disposal of a subsidiary	(1,529,046	)	—		—
Others	12,073,069		24,038,193		75,250,084

Total	43,820,635		2,480,979,830		(26,848,287	)

Skyscanner

Acquisitions disclosures

Summary of purchase price allocation

	RMB
Net assets (including cash acquired with amount of RMB 571 million)	265,145,209
Identifiable intangible assets — trademark and domain	1,981,771,584
Identifiable intangible assets — Supplier relationship	928,904,634
Identifiable intangible assets — IT Platform	190,737,332
Deferred tax liabilities	(620,282,710	)
Non-controlling interests	(315,836,071	)
Goodwill	9,583,716,450

Total purchase consideration	12,014,156,428

Qunar

Acquisitions disclosures

Summary of fair value of acquisition cost

	RMB	US$
Fair value of previously held equity interest (1)	21,698,582,100	3,416,184,974
Consideration paid in December 2015	10,842,783,275	1,687,067,570

Total purchase cost	32,541,365,375	5,103,252,544

(1)

Which represents fair value of purchase consideration for the initial 45% equity method investment in October 2015

Summary of purchase price allocation

	RMB
Cash and cash equivalents	5,169,733,816
Advance to suppliers	1,177,437,522
Prepayments and other current assets	3,075,154,225
Long-term investments	712,967,197
Fixed assets, net	232,085,350
Other non-current assets	127,412,235
Accounts payable	(1,584,668,322	)
Taxes payable	(1,028,960,573	)
Short-term debts	(3,884,097,322	)
Accrued expenses and other current liabilities	(4,526,855,580	)
Non-current liability	(93,019,969	)
Non-controlling interests	(5,282,358	)

Net assets of Qunar acquired	(628,093,779	)
Identifiable intangible assets — trademark and domain	8,998,429,167
Identifiable intangible assets — technology and supplier network for new products*	948,347,023
Deferred tax liabilities	(2,489,866,400	)
Non-controlling interests	(17,850,614,771	)
Goodwill	43,563,164,135

Total purchase consideration	32,541,365,375

Schedule of pro forma results

In thousands	2014		2015
	RMB		RMB
Pro-forma net revenues	8,917,279		14,812,533
Pro-forma net loss	(1,889,396	)	(5,086,934	)

Company's share option activity under all the incentive plans

The following table summarized the Qunar’s share option activity under all the option plans (in US$, except shares):

	Number of Shares		Weighted Average Exercise Price	Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding at December 31, 2015	18,759,438		0.01	9.36	329,603,326

Granted	1,846,200		0.01
Exercised	(9,140,502	)	0.01
Forfeited/Cancelled	(1,575,213	)	0.01

Outstanding at December 31, 2015	9,889,923		0.01	8.54	99,393,726

Vested and expect to vest at December 31, 2016	9,241,666		0.01	8.53	92,878,743

Exercisable at December 31, 2016	2,107,686		0.01	8.52	21,182,244

Assumptions of Black-Scholes pricing model

		2016
Risk-free interest rate		0.22%-2.10%
Expected life (years)		0.13-6.00
Expected dividend yield		—
Volatility		26%-40%

Travelfusion

Acquisitions disclosures

Summary of purchase price allocation

	RMB
Net assets	36,936,493
Identifiable intangible assets — trademark and domain	78,058,071
Identifiable intangible assets — Business relationship	261,146,660
Identifiable intangible assets — IT Platform	5,051,377
Deferred tax liabilities	(72,293,783	)
Non-controlling interests	(275,995,802	)
Goodwill	687,633,024

Total purchase consideration	720,536,040

A technology company focusing on hotel customer reviews

Acquisitions disclosures

Summary of purchase price allocation

	RMB
Net assets	2,134,170
Identifiable intangible assets — System, brand and customer relationship	44,752,000
Deferred tax liabilities	(11,188,000	)
Goodwill	333,320,722
Fair value of previously held equity interest	(129,360,000	)

Total purchase consideration	239,658,892

An offline travel agency

Acquisitions disclosures

Summary of purchase price allocation

	RMB
Net assets (including the cash acquired of RMB142 million)	164,411,042
Identifiable intangible assets — customer relationship	67,000,000
Identifiable intangible assets — trademark	174,800,000
Deferred tax liabilities	(60,450,000	)
Non-controlling interests	(370,656,000	)
Goodwill	331,615,519

Total purchase consideration	306,720,561

PREPAYMENTS AND OTHER CURRENT ASSETS (Tables)

12 Months Ended

Dec. 31, 2016

PREPAYMENTS AND OTHER CURRENT ASSETS

Components of prepayments and other current assets

	2015	2016
	RMB	RMB
Prepayments and deposits to vendors	5,527,802,541	5,082,058,275
Prepaid expenses	262,797,329	439,983,044
Receivables from financial institution	221,221,736	207,182,863
Employee advances	453,304,997	99,042,188
Interest receivable	71,558,995	81,999,660
Others	213,280,229	296,719,656

Total	6,749,965,827	6,206,985,686

LONG-TERM DEPOSITS AND PREPAYMENTS (Tables)

12 Months Ended

Dec. 31, 2016

LONG-TERM DEPOSITS AND PREPAYMENTS

Components of long-term deposits and prepayments

	2015	2016
	RMB	RMB

Prepayments for purchase of long lived assets	120,699,207	625,084,070
Deposits paid to airline suppliers	141,890,707	244,072,331
Deposits paid to hotel suppliers	118,851,829	126,728,198
Deposits paid to lessors	40,360,900	21,615,099
Deposits paid to travel bureau	2,586,292	5,551,278
Others	62,397,033	124,228,221

Total	486,785,968	1,147,279,197

PROPERTY, EQUIPMENT AND SOFTWARE (Tables)

12 Months Ended

Dec. 31, 2016

PROPERTY, EQUIPMENT AND SOFTWARE

Schedule of property, equipment and software and its related accumulated depreciation and amortization

	2015		2016
	RMB		RMB
Buildings	5,048,349,531		5,148,644,010
Computer equipment	534,734,639		731,530,644
Website-related equipment	377,457,565		536,705,335
Furniture and fixtures	125,609,830		178,703,320
Software	101,444,245		124,082,233
Leasehold improvements	129,401,013		115,997,785
Construction in progress	11,231,274		10,056,257
Less: accumulated depreciation and amortization	(772,268,598	)	(1,253,759,503	)

Total net book value	5,555,959,499		5,591,960,081

INVESTMENTS (Tables)

12 Months Ended

Dec. 31, 2016

INVESTMENTS

Schedule of long-term investments

	2015	2016
	RMB	RMB

Held to maturity investment
Long-term time deposit	1,020,425,292	1,059,812,729

Available-for-sale investments-measured at fair value
China Eastern Airlines	—	3,293,478,259
Tujia	2,876,749,196	3,081,585,780
Hanting	1,116,231,309	1,984,037,413
eLong	—	1,877,945,423
LY.com	1,745,309,616	1,523,436,120
MakeMyTrip	—	1,519,309,068
eHi	793,869,127	612,309,518
Tuniu	430,659,093	252,746,139
Easy Go	527,301,676	228,317,887
Others	316,742,816	94,311,000

Equity method investments
BTG	—	2,498,763,234
eLong	2,632,145,397	235,138,072
Homeinns	961,773,378	—
Investment funds	261,520,937	616,160,937
Others	199,527,495	764,137,539

Others-cost method investments	988,268,166	891,333,247

Total net book value	13,870,523,498	20,532,822,365

Schedule of carrying amount and unrealized securities holding loss for equity method investment in eLong

	2015		2016
			Before the Reorganization		After the Reorganization
	RMB		RMB		RMB
Investment cost	2,615,954,303		2,732,852,735		2,545,486,916
Transfer out to Available-for-sale investments	—		—		(1,778,322,045	)
Foreign currency translation	116,898,432		70,917,988		33,536,784

Total investment cost	2,732,852,735		2,803,770,723		800,701,655


Value booked under equity method
Share of cumulative loss	(98,560,550	)	(255,175,523	)	(563,698,613	)
Amortization of outside difference, net of tax	(2,146,788	)	(3,108,284	)	(1,864,970	)

Total booked value under equity method.	(100,707,338	)	(258,283,807	)	(565,563,583	)


Net book value	2,632,145,397		2,545,486,916		235,138,072

Schedule of financial information of investees

					Year ended December 31,
	2016				2015				2014
	eLong		Other equity investments		Qunar		Other equity investments		Equity investments
Operating data:
Revenue	1,895,409,404		5,917,850,003		841,814,520		7,069,224,177		6,667,675,419
Gross profit	997,644,227		4,785,282,088		537,240,212		1,581,396,551		1,280,767,842
Income from operations	(1,312,847,794	)	155,471,096		(4,792,664,736	)	(20,961,158	)	646,012,004
Net income/(loss)	(1,635,384,928	)	(62,190,299	)	(4,917,200,749	)	(189,461,030	)	446,181,771
Net income/(loss) attributable to our equity method investments companies	(722,307,716	)	(55,314,772	)	(2,352,388,839	)	(127,465,948	)	66,427,909
Add: Equity dilution impact	(832,336	)	11,027,933		—		(8,314,364	)	20,577,432
Add: Gain/(loss) from disposal of equity investments, including the remeasurement gain/(loss) from previously held equtiy investments in step acquisitions	—		1,369,310,070		2,352,388,839		—		100,185,800
Equity in income/(loss) of affiliates	(723,140,052	)	1,325,023,231		—		(135,780,312	)	187,191,141

			As of December 31,
	2016		2015		2014
Balance sheet data:
Current assets	1,978,681,514	3,353,714,017	9,433,080,372	4,091,410,052	1,383,806,709
Long-term assets	454,710,971	17,298,415,142	1,072,464,782	10,102,034,376	9,377,157,121
Current liabilities.	1,687,293,575	11,595,906,780	10,442,341,153	4,043,523,264	1,771,565,291
Long-term liabilities.	15,970,032	1,650,938,946	93,019,969	466,730,372	3,549,170,630
Non-controlling interests.	15,512,748	1,944,540,518	5,282,358	76,928,317	15,188,000

FAIR VALUE MEASUREMENT (Tables)

12 Months Ended

Dec. 31, 2016

FAIR VALUE MEASUREMENT

Schedule of fair value assets measured on recurring basis

	Fair Value Measurement at December 31, 2015 Using
	Quoted Prices in Active Market for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Unobservable inputs (Level 3)	Fair Value at December 31, 2015
	RMB	RMB	RMB	RMB	US$
Financial products	—	7,937,009,389	—	7,937,009,389	1,225,263,112
Time deposits	—	1,153,526,819	—	1,153,526,819	178,073,855
Available-for-sale investments
Tujia	—	—	2,876,749,196	2,876,749,196	444,093,550
LY.com	—	—	1,745,309,616	1,745,309,616	269,429,377
Hanting	1,116,231,309	—	—	1,116,231,309	172,316,421
eHi	793,869,127	—	—	793,869,127	122,552,275
Easy Go	—	—	527,301,676	527,301,676	81,401,352
Tuniu	430,659,093	—	—	430,659,093	66,482,308
Others	—	—	316,742,816	316,742,816	48,896,665

Total	2,340,759,529	9,090,536,208	5,466,103,304	16,897,399,041	2,608,508,915

	Fair Value Measurement at December 31, 2016 Using
	Quoted Prices in Active Market for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Unobservable inputs (Level 3)	Fair Value at December 31, 2016
	RMB	RMB	RMB	RMB	US$
Financial products	—	8,414,292,445	—	8,414,292,445	1,211,910,189
Time deposits	—	6,758,382,572	—	6,758,382,572	973,409,560
Available-for-sale investments
China Eastern Airlines	3,293,478,259	—	—	3,293,478,259	474,359,536
Tujia	—	—	3,081,585,780	3,081,585,780	443,840,671
Hanting	1,984,037,413	—	—	1,984,037,413	285,760,826
eLong	—	—	1,877,945,423	1,877,945,423	270,480,401
LY.com	—	—	1,523,436,120	1,523,436,120	219,420,441
MakeMyTrip	1,519,309,068	—	—	1,519,309,068	218,826,022
eHi	612,309,518	—	—	612,309,518	88,190,914
Tuniu	252,746,139	—	—	252,746,139	36,403,016
Easy Go	—	—	228,317,887	228,317,887	32,884,616
Others	—	—	94,311,000	94,311,000	13,583,609

Total	7,661,880,397	15,172,675,017	6,805,596,210	29,640,151,624	4,269,069,801

Schedule of roll forward of major Level 3 investments

	Tujia	eLong	LY.com		Easy Go		Others
	RMB	RMB	RMB		RMB		RMB
Fair value of Level 3 investment as at December 31, 2014	—	—	1,547,844,523		627,905,501		207,514,062
Transfer in and/or out of Level 3	2,784,302,479	—	—		—		94,928,814
Effect of exchange rate change	53,534,169	—	—		13,372,961		7,103,210
The change in fair value of the investment	38,912,548	—	197,465,093		(113,976,786	)	7,196,730

Fair value of Level 3 investment as at December 31, 2015	2,876,749,196	—	1,745,309,616		527,301,676		316,742,816

Transfer in and/or out of Level 3	—	1,778,322,045	—		—		(190,921,630	)
Disposal of investment	—	—	—		(317,261,674	)	—
Effect of exchange rate change	203,797,833	98,468,430	—		18,277,885		4,847,716
Other than temporary impairment	—	—	—		—		(36,357,902	)
The change in fair value of the investment	1,038,751	1,154,948	(221,873,496	)	—		—

Fair value of Level 3 investment as at December 31, 2016	3,081,585,780	1,877,945,423	1,523,436,120		228,317,887		94,311,000


Fair value of Level 3 investments as at December 31, 2016 (US$)	443,840,671	270,480,401	219,420,441		32,884,616		13,583,609

Schedule of significant unobservable inputs used in the valuation

Unobservable Input	Tujia	eLong	LY.com	Easy Go

Weighted average cost of capital	18%	14.5%	17%	28%
Terminal growth rate	3%	3%	3%	3%
Lack of marketability discount	20%	18%	15%	20%
Time to liquidation	2.8 years	5 years	3 years	2 years
Risk-free rate	3.5%	1.93%	2.74%	1.27%
Expected volatility	42%	46.1%	46%	45.2%
Probability	Liquidation scenario: 30% Redemption scenario: 30% IPO scenario: 40%	Liquidation scenario: 30% Redemption scenario: 30% IPO scenario: 40%	Liquidation scenario: 70% IPO scenario: 30%	Liquidation scenario: 60% IPO scenario: 40%
Dividend yield	Nil	Nil	Nil	Nil

GOODWILL (Tables)

12 Months Ended

Dec. 31, 2016

GOODWILL

Schedule of changes in the carrying amount of goodwill

	2015		2016
	RMB		RMB

Balance at beginning of year	1,892,507,708		45,690,440,903
Acquisition of Skyscanner (Note 2-“Acquisitions”)	—		9,583,716,450
Acquisition of Qunar (Note 2-“Acquisitions”)	42,980,923,491		582,240,644
Acquisition of Travelfusion (Note 2-“Acquisitions”)	687,633,024		—
Acquisition of an offline travel agency in 2014 and measurement period adjustment in 2015 (Note 2-“Acquisitions”)	945,561		—
Acquisition of a technology company focusing on hotel customer reviews in 2014 and measurement period adjustment in 2015 (Note 2-“Acquisitions”)	(33,564,000	)	—
Others	161,995,119		158,787,593

Balance at end of period	45,690,440,903		56,015,185,590

INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2016

INTANGIBLE ASSETS

Schedule of intangible assets

	2015		2016
	RMB		RMB
Intangible asset
Intangible assets to be amortized
Business Relationship (Representing the relationship with the travel service providers and other business partners)	878,529,857		1,815,034,491
Technology	447,515,717		696,499,639
Customer relationship	96,942,578		101,042,578
Non-compete agreements	11,479,610		11,479,610
Cross-border travel agency license	1,117,277		1,117,277
Others	17,990,000		17,990,000
Intangible assets not subject to amortization
Trade mark	9,631,703,672		11,613,475,256
Others	21,936,321		22,140,607

	11,107,215,032		14,278,779,458

Less: accumulated amortization
Intangible assets to be amortized
Business Relationship	(34,848,999	)	(175,130,119	)
Technology	(15,566,396	)	(110,511,387	)
Customer relationship	(31,250,912	)	(49,086,468	)
Non-compete agreements	(11,479,610	)	(11,479,610	)
Cross-border travel agency license	(1,117,277	)	(1,117,277	)
Others	(5,036,667	)	(6,684,666	)

	(99,299,861	)	(354,009,527	)

Net book value
Intangible assets to be amortized
Business Relationship	843,680,858		1,639,904,372
Technology	431,949,321		585,988,252
Customer relationship	65,691,666		51,956,110
Non-compete agreements	—		—
Cross-border travel agency license	—		—
Others	12,953,333		11,305,334
Intangible assets not subject to amortization
Trade mark	9,631,703,672		11,613,475,256
Others	21,936,321		22,140,607

	11,007,915,171		13,924,769,931

Schedule of useful lives of finite-lived intangible assets

Customer relationship		3-10 years
Business Relationship		5-10 years
Technology		5-6 years
Non-compete agreements		5 years
Cross-border travel agency license		8 years

Schedule of future estimated amortization expense finite-lived intangible assets

		Amortization
		RMB

2017		386,006,256
2018		385,701,422
2019		379,498,256
2020		362,549,757
2021		205,505,894

		1,719,261,585

SHORT-TERM DEBT AND CURRENT PORTION OF LONG-TERM DEBT (Tables)

12 Months Ended

Dec. 31, 2016

SHORT-TERM DEBT AND CURRENT PORTION OF LONG-TERM DEBT

Summary of short-term debt

	2015	2016
	RMB	RMB
Short-term bank borrowings	4,544,819,828	6,668,284,614
2017 Convertible Senior Notes Due 2017 (Note 17)	324,796,892	170,867,230
2018 Convertible Senior Notes Due 2018 (Note 17)	5,182,240,000	—
Qunar CB	2,658,356,678	—
Other short-term debt	—	48,157,745

Total	12,710,213,398	6,887,309,589

RELATED PARTY TRANSACTIONS AND BALANCES (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of related party transactions

	2014	2015	2016
	RMB	RMB	RMB
Commissions from eLong (a)	—	7,191,870	261,139,916
Commissions from Homeinns (a)	38,139,325	34,556,539	66,921,837
Commissions from Hanting (a)	19,234,632	17,740,390	44,094,542
Commissions from Tujia (a)	—	5,967,489	6,023,389
Entrusted loan and interest to a technology company focusing on hotel customer reviews (b)	694,577	—	—
Repayment of entrusted loan and interest from Baidu (c)	—	—	652,299,803
Shareholders’ loan and interest to Skyseas (d)	505,955,950	15,826,363	73,399,675
Commissions to eLong (e)	—	9,532,316	85,780,819
Commissions to LY.com (e)	76,093,733	75,297,659	62,150,144
Commissions to Baidu (e)	—	—	96,056,853
Online marketing service from Baidu (f)	—	89,244,042	110,064,311
Online marketing service from Hanting (f)	—	—	13,000,000
Repayment of entrusted loan and interest to Baidu (g)	—	—	1,837,384,234
Purchase of tour package from Ananda Travel Service (Aust.) Pty Limited (“Ananda”) (h)	27,197,283	11,351,388	12,714,298

(a)

(b)

(c)

(d)

(e)

The Company entered into agreements to provide hotel rooms to eLong, LY.com and Baidu. The transactions above represent the commissions paid to these related parties.

(f)

The Company has entered into marketing service agreements with Baidu and Hanting. The transactions above represent the marketing service fee paid to these related parties.

(g)

(h)

The Company’s tour package supplier, Ananda is an affiliate of Wing On Travel. Tour package purchase from Ananda for the years ended December 31, 2014, 2015 and 2016 is presented as above.

Schedule of significant balances with related parties

	2015	2016
	RMB	RMB
Due from related parties, current:
Due from Baidu (a)	788,860,421	408,834,667
Due from eLong	34,515,489	132,381,883
Due from Skyseas	56,727,885	132,035,460
Due from LY.com	33,051,263	96,308,665
Due from others	48,636,400	18,043,311

	961,791,458	787,603,986


Due from related parties, non-current:
Due from Skyseas	543,911,586	599,913,241


Due to related parties, current:
Due to eLong	165,436,171	506,461,015
Due to Baidu(a)	1,891,209,753	293,579,066
Due to others	6,320,029	37,381,264

	2,062,965,953	837,421,345

(a)

TAXATION (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of income/(loss) from domestic and foreign components before income tax expenses

	2014		2015	2016
	RMB		RMB	RMB
Domestic	627,725,908		1,873,383,988	2,207,474,278
Foreign	(592,473,548	)	1,131,979,994	(3,967,579,279	)

Total	35,252,360		3,005,363,982	(1,760,105,001	)

Schedule of composition of income tax expense

	2014		2015	2016
	RMB		RMB	RMB
Current income tax expense	228,395,153		383,723,730	454,533,605
Deferred tax (benefit)/expense	(97,573,997	)	86,464,693	23,475,428

Income tax expense	130,821,156		470,188,423	478,009,033

Schedule of reconciliation of the differences between statutory tax rate and the effective tax rate

	2014		2015		2016
Statutory CIT rate	25	%	25	%	25	%
Tax differential from statutory rate applicable to subsidiaries with preferential tax rates	(375	)%	(5	)%	8	%
Gain on deconsolidation of a subsidiary with a withholding tax rate of 10% versus the statutory CIT rate	—		(11	)%	—
Non-deductible expenses incurred	480	%	6	%	(50	)%
Change in valuation allowance	241	%	1	%	(10	)%

Effective CIT rate	371	%	16	%	(27	)%

Schedule of effect of preferential tax on China operations

	2014	2015	2016
	RMB	RMB	RMB
Tax holiday effect	85,036,934	162,896,542	177,799,057
Basic net income per ADS effect	0.62	1.08	0.38
Diluted net income per ADS effect	0.56	0.86	0.38

Schedule of significant components of deferred tax assets and liabilities

	2015		2016
	RMB		RMB
Accrued expenses	109,784,998		149,205,615
Loss carry forward	78,771,363		159,747,175
Accrued liability for customer reward related programs	114,965,397		122,635,196
Accrued staff salary	110,263,508		55,228,349
Others	23,038,753		38,782,032
Less: Valuation allowance of deferred tax assets	(31,489,450	)	(150,286,773	)

Total deferred tax assets, non-current	405,334,569		375,311,594


Deferred tax liabilities, non-current:
Recognition of intangible assets arise from business combinations	(3,045,259,390	)	(3,607,882,808	)


Net deferred tax assets/(liabilities)	(2,639,924,821	)	(3,232,571,214	)

Schedule of movement of valuation allowances

	2014	2015		2016
	RMB	RMB		RMB
Balance at beginning of year	86,735,795	183,449,500		31,489,450
Current year additions	96,713,705	31,590,648		118,797,323
Deconsolidation of Tujia	—	(183,550,698	)	—

Balance at end of year	183,449,500	31,489,450		150,286,773

Subsidiaries

Schedule of reconciliation of the differences between statutory tax rate and the effective tax rate

	Impact on the effective tax rates
			2014		2015		2016
Ctrip Computer Technology (Shanghai) Co., Ltd.	15	%	(74	)%	(1.4	)%	4	%
Ctrip Travel Information Technology (Shanghai) Co., Ltd.	15	%	(48	)%	(0.4	)%	2	%
Ctrip Travel Network Technology (Shanghai) Co., Ltd.	15	%	(154	)%	(3.0	)%	7	%
Chengdu Ctrip Travel Agency Co., Ltd.	15	%	(11	)%	(0.2	)%	1	%
Ctrip Hong Kong subsidiaries	16.5	%	(88	)%	(0.3	)%	1	%
Qunar and subsidiaries	15	%	—		—		(7	)%
Total			(375	)%	(5.3	)%	8	%

OTHER PAYABLES AND ACCRUALS (Tables)

12 Months Ended

Dec. 31, 2016

OTHER PAYABLES AND ACCRUALS

Schedule of other payables and accruals

	2015	2016
	RMB	RMB
Accrued operating expenses	1,385,818,397	1,549,809,298
Deposits received from suppliers and packaged-tour users	373,423,895	460,648,199
Due to employees for stock option proceeds received on their behalf	88,083,814	250,831,976
Payable for acquisition	125,377,844	157,004,868
Deposit for special bonus program (a)	92,206,022	168,404,481
Interest payable	84,604,548	103,016,365
Accruals for property and equipment	53,582,762	22,855,856
Deferred revenue	18,235,219	12,664,375
Advances received for a potential investment disposal	—	17,665,162
Payable for Qunar CB holders (b)	1,233,185,395	—
Others	106,649,754	106,920,667

Total	3,561,167,650	2,849,821,247

(a)

(b)

In June 2015, Qunar issued US$ 500 million, 2% interest rate convertible senior notes due 2021 (the “Qunar CB”) to several institutional investors (the “CB Holders”). The Qunar CB included a Make-Whole provision, where the CB Holders are granted a right to convert the Qunar CB into Qunar’s ADS at an increased conversion rate (the “Make-Whole Rate”) or request redemption at an equivalent dollar amount in the event of certain fundamental changes of Qunar, including change in shareholding over 10%. In October 2015, Ctrip obtained 45% equity interest of Qunar from Baidu which triggered the Make-Whole provision. In December 2015, Ctrip entered into the agreements with the CB Holders to settle all the outstanding Qunar CB in the consideration equal to the value of Qunar ADS as if were converted at the Make-Whole Rate. The total consideration included cash and the ordinary shares of Ctrip with the aggregated amount of RMB4.5billion. Such liability of Qunar CB is considered as assumed liability at the Company for Qunar and was charged in pre-acquisition of Qunar. The settlement was paid in January 2016.

LONG-TERM DEBT (Tables)

12 Months Ended

Dec. 31, 2016

LONG-TERM DEBT

Schedule of convertible senior notes

	2015		2016
	RMB		RMB
2018 1.25% Convertible Senior Notes	—		5,554,400,000
2020 1% Convertible Senior Notes	4,534,460,000		4,860,100,000
2025 1.99% Convertible Senior Notes	2,591,120,000		2,777,200,000
2022 1.25% Convertible Senior Notes	—		6,769,425,000
Priceline 1% Convertible 2019 Notes	3,238,900,000		3,471,500,000
Priceline 1% Convertible 2020 Notes	1,619,450,000		1,735,750,000
Priceline 2% Convertible 2025 Notes	3,238,900,000		3,471,500,000
Priceline 1.25% Convertible 2022 Notes	—		173,575,000
Hillhouse 2% 2025 Convertible Notes	3,238,900,000		3,471,500,000
Long-term loan	—		2,550,000,000
Less: Debt issuance cost	(107,121,740	)	(184,276,447	)

Total	18,354,608,260		34,650,673,553

NON-CONTROLLING INTERESTS (Tables)

12 Months Ended

Dec. 31, 2016

NON-CONTROLLING INTERESTS

Schedule of noncontrolling interests

	2015	2016


Qunar and subsidiaries	17,855,897,129	2,197,375,082
An offline travel agency	455,614,677	454,550,413
Skyscanner	—	315,836,071
Travelfusion	289,875,458	315,803,463
A technology company focusing on hotel customer reviews	262,762,132	285,110,984
An online trip package service provider	134,586,452	133,004,201
Others	135,462,399	282,237,578

	19,134,198,247	3,983,917,792

EARNINGS/(LOSSES) PER SHARE (Tables)

12 Months Ended

Dec. 31, 2016

EARNINGS/(LOSSES) PER SHARE

Schedule of basic earnings/(loss) per share and diluted earnings per share

	2014	2015	2016
	RMB	RMB	RMB
Numerator:
Net income/(loss) attributable to Ctrip’s shareholders	242,739,781	2,507,655,884	(1,430,703,195	)
Eliminate the dilutive effect of interest expense of convertible notes	—	185,589,773	—

Numerator for diluted earnings/(loss) per share	242,739,781	2,693,245,657	(1,430,703,195	)


Denominator:
Denominator for basic earnings/(loss) per ordinary share — weighted average ordinary shares outstanding	34,289,170	37,797,698	59,166,582
Dilutive effect of share options	3,106,496	2,962,481	—
Dilutive effect of convertible notes	—	6,102,417	—
Dilutive effect of convertible notes sold warrants	812,192	512,652	—

Denominator for diluted earnings/(loss) per ordinary share	38,207,858	47,375,248	59,166,582


Basic earnings/(loss) per ordinary share	7.08	66.34	(24.18	)

Diluted earnings/(loss) per ordinary share	6.35	56.85	(24.18	)


Basic earnings/(loss) per ADS	0.88	8.29	(3.02	)

Diluted earnings/(loss) per ADS	0.79	7.11	(3.02	)

Schedule of weighted average number of ordinary shares excluded from computation of diluted earnings per share

	2014	2015	2016


2017 convertible senior notes	1,587,142	—	435,248
2018 convertible senior notes	2,551,346	—	2,551,360
2020 convertible senior notes	—	—	1,608,985
2025 convertible senior notes	—	486,999	935,550
2022 convertible senior notes	—	—	559,282
Priceline convertible 2019 notes	614,535	—	1,536,338
Priceline convertible 2020 notes	—	—	599,400
Priceline convertible 2025 notes	—	50,023	912,919
Priceline convertible 2022 notes	—	—	14,341
A long-term equity investment firm notes	—	50,023	912,919
Outstanding weighted average stock options	74,104	64,074	3,678,030
Sold Warrants	1,996,407	1,734,865	303,176

	6,823,534	2,385,984	14,047,548

COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2016

COMMITMENTS AND CONTINGENCIES

Schedule of operating lease commitments

		Office Premises
		RMB
2017		169,718,510
2018		51,750,674
2019		20,189,854
2020		6,169,875
2021		3,915,262
Thereafter		19,472,555

		271,216,730

PRINCIPAL ACCOUNTING POLICIES - Major VIEs and VIEs' subsidiaries (Details)	12 Months Ended
	Dec. 31, 2016 CNY (¥) item
Shanghai Ctrip Commerce \| Two senior officers of the Company
Major variable interest entities and their subsidiaries
Number of officers \| item	2
Shareholding percentage of VIE	100.00%
Registered capital of VIE	¥ 30,000,000
Beijing Ctrip \| Shanghai Ctrip
Major variable interest entities and their subsidiaries
Shareholding percentage of VIE	100.00%
Registered capital of VIE	¥ 40,000,000
Guangzhou Ctrip \| Two senior officers of the Company
Major variable interest entities and their subsidiaries
Number of officers \| item	2
Shareholding percentage of VIE	100.00%
Registered capital of VIE	¥ 3,000,000
Shanghai Ctrip \| Two senior officers of the Company
Major variable interest entities and their subsidiaries
Number of officers \| item	2
Shareholding percentage of VIE	100.00%
Registered capital of VIE	¥ 10,050,000
Shenzhen Ctrip \| Two senior officers of the Company
Major variable interest entities and their subsidiaries
Number of officers \| item	2
Shareholding percentage of VIE	100.00%
Registered capital of VIE	¥ 2,500,000
Ctrip Insurance \| Shanghai Ctrip Commerce and Ctrip Computer Technology
Major variable interest entities and their subsidiaries
Shareholding percentage of VIE	100.00%
Registered capital of VIE	¥ 50,000,000
Shanghai Huacheng \| Shanghai Ctrip Commerce
Major variable interest entities and their subsidiaries
Shareholding percentage of VIE	100.00%
Registered capital of VIE	¥ 100,000,000
Chengdu Ctrip \| Two senior officers of the Company
Major variable interest entities and their subsidiaries
Number of officers \| item	2
Shareholding percentage of VIE	100.00%
Registered capital of VIE	¥ 20,000,000
Chengdu Ctrip International \| Shanghai Ctrip
Major variable interest entities and their subsidiaries
Shareholding percentage of VIE	100.00%
Registered capital of VIE	¥ 2,000,000
Qunar Beijing \| Two senior officers of the Company
Major variable interest entities and their subsidiaries
Number of officers \| item	2
Shareholding percentage of VIE	100.00%
Registered capital of VIE	¥ 11,000,000

PRINCIPAL ACCOUNTING POLICIES - Key agreements with the VIEs and summary financial information of the VIEs (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2013 CNY (¥)
Financial information of the group's VIEs
Value of an asset of a consolidated VIE that can be used only to settle obligations of the VIE, except for registered capital and PRC statutory reserves		¥ 0
Total assets	$ 20,799,928,226				¥ 144,413,901,668		¥ 118,842,591,960
Total liabilities	9,922,677,397				68,893,149,166		55,157,663,979
Cash and cash equivalents	2,655,146,371			¥ 5,300,887,799	18,434,681,251	$ 2,767,632,821	19,215,674,674	¥ 7,138,344,814
Short-term investment	2,032,674,966				14,112,862,288		8,235,785,516
Accounts receivables	666,112,390				4,624,818,322		3,150,768,364
Prepayments and other current assets	893,991,889				6,206,985,686		6,749,965,827
Advance from end users	1,179,726,351				8,190,840,057		5,955,827,306
Accounts payable	1,048,363,976				7,278,791,082		5,944,501,681
Other payables and accruals	410,459,635				2,849,821,247		3,561,167,650
Net revenues	2,769,471,383	19,228,439,814	¥ 10,897,568,061	7,346,918,369
Cost of revenues	681,225,723	4,729,750,192	3,043,439,819	2,100,606,413
Net income / (loss)	(235,666,263)	(1,636,230,855)	2,399,395,247	91,622,345
Net cash provided by operating activities	$ 759,431,152	¥ 5,272,730,491	3,048,809,916	1,958,603,856
Shareholders of our consolidated affiliated Chinese entities, except for Hui Cao and Hui Wang \| Amended and restated exclusive option agreements
Financial information of the group's VIEs
Term of exclusive option agreements	10 years	10 years
Term of automatic renewal of exclusive option agreements	10 years	10 years
Ctrip Computer Technology, Ctrip Travel Network and Ctrip Travel Information \| Amended and Restated Technical Consulting and Services Agreements
Financial information of the group's VIEs
Term of technical consulting and services agreements	10 years	10 years
Term of automatic renewal of technical consulting and services agreements	10 years	10 years
Written notice period required to be served for the termination of agreements	30 days	30 days
Ctrip Computer Technology, Ctrip Travel Network and Ctrip Travel Information \| Amended and Restated Technical Consulting and Services Agreements \| Minimum
Financial information of the group's VIEs
Average rate per ticket based on number of tickets sold (in RMB or US dollars per ticket)	$ 0.7	¥ 5
Average rate per person per tour based on number of tour packages sold (in RMB or US dollars per person per tour)	5.2	36
Ctrip Computer Technology, Ctrip Travel Network and Ctrip Travel Information \| Amended and Restated Technical Consulting and Services Agreements \| Maximum
Financial information of the group's VIEs
Average rate per ticket based on number of tickets sold (in RMB or US dollars per ticket)	2.3	16
Average rate per person per tour based on number of tour packages sold (in RMB or US dollars per person per tour)	$ 42.5	¥ 295
Qunar Software \| Loan Agreements
Financial information of the group's VIEs
Period of notice after event of default	15 days	15 days
Qunar and Qunar Software \| Amended and restated exclusive option agreements
Financial information of the group's VIEs
Notice period for termination of agreement	30 days	30 days
Variable interest entities
Financial information of the group's VIEs
Amount of registered capital and PRC statutory reserves of VIEs					590,000,000
Total assets					30,544,580,876		22,188,424,951
Less: Inter-company receivables					(2,050,819,348)		(3,808,937,898)
Total assets excluding inter-company					28,493,761,528		18,379,487,053
Total liabilities					29,101,732,239		20,998,061,568
Less: Inter-company payables					(15,904,065,265)		(8,572,648,210)
Total liabilities excluding inter-company					13,197,666,974		12,425,413,358
Cash and cash equivalents					10,000,000,000		2,800,000,000
Short-term investment					6,500,000,000		3,100,000,000
Accounts receivables					3,900,000,000		2,700,000,000
Prepayments and other current assets					3,500,000,000		4,100,000,000
Investments (non-current)					2,800,000,000		2,400,000,000
Advance from end users					5,000,000,000		5,100,000,000
Accounts payable					4,300,000,000		4,000,000,000
Other payables and accruals					1,300,000,000		2,100,000,000
Short- term debt					¥ 1,200,000,000		¥ 164,000,000
Net revenues		¥ 8,706,139,377	6,384,556,234	4,138,380,618
Cost of revenues		2,442,997,433	1,983,511,461	1,252,538,920
Net income / (loss)		¥ 100,653,423	(73,523,163)	(87,193,139)
Revenues as a percent of total	45.00%	45.00%
Net loss before the deduction of inter-company consulting fee charges		¥ 2,800,000,000	¥ 1,000,000,000	¥ 1,100,000,000
Service fees charged from affiliates as percentage of their total net income	96.30%	96.30%	107.10%	109.40%
Net cash provided by operating activities		¥ 7,190,925,721	¥ 160,298,446	¥ 1,052,138,839

PRINCIPAL ACCOUNTING POLICIES - Foreign currencies and land use rights (Details)	12 Months Ended
	Dec. 31, 2016 ¥ / $
RMB/USD exchange rate used in translation	0.1440
Minimum
Useful life	3 years
Maximum
Useful life	10 years
Land use rights \| Minimum
Useful life	40 years
Land use rights \| Maximum
Useful life	50 years

PRINCIPAL ACCOUNTING POLICIES - Property, equipment and software (Details)	12 Months Ended
	Dec. 31, 2016
Building \| Minimum
Property, equipment and software
Estimated useful life	20 years
Building \| Maximum
Property, equipment and software
Estimated useful life	40 years
Website-related equipment
Property, equipment and software
Estimated useful life	5 years
Computer equipment \| Minimum
Property, equipment and software
Estimated useful life	3 years
Computer equipment \| Maximum
Property, equipment and software
Estimated useful life	5 years
Furniture and fixtures \| Minimum
Property, equipment and software
Estimated useful life	3 years
Furniture and fixtures \| Maximum
Property, equipment and software
Estimated useful life	5 years
Software \| Minimum
Property, equipment and software
Estimated useful life	3 years
Software \| Maximum
Property, equipment and software
Estimated useful life	5 years

PRINCIPAL ACCOUNTING POLICIES - Acquisitions (Details) £ in Millions				1 Months Ended										6 Months Ended		12 Months Ended
	Dec. 09, 2016 GBP (£)	Dec. 09, 2016 CNY (¥)	Dec. 10, 2015 shares	Dec. 31, 2016 GBP (£) shares	Dec. 31, 2015 USD ($)	Dec. 31, 2015 CNY (¥) shares	Oct. 31, 2015 USD ($) Vote shares	Oct. 31, 2015 CNY (¥) Vote shares	Jan. 31, 2015 GBP (£)	Jan. 31, 2015 CNY (¥)	Dec. 31, 2014 USD ($)	Dec. 31, 2014 CNY (¥)	Oct. 31, 2014 CNY (¥)	Jun. 30, 2016 USD ($)	Jun. 30, 2016 CNY (¥)	Dec. 31, 2016 GBP (£) shares	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥) shares	Dec. 31, 2014 CNY (¥)	Oct. 31, 2014 CNY (¥)	Dec. 31, 2016 USD ($) shares	Dec. 31, 2016 CNY (¥) shares
Business combination disclosures
Shares outstanding \| shares				64,105,412		51,167,228										64,105,412		51,167,228			64,105,412	64,105,412
Purchase price allocation
Goodwill						¥ 45,690,440,903						¥ 1,892,507,708						¥ 45,690,440,903	¥ 1,892,507,708		$ 8,067,864,841	¥ 56,015,185,590
Decrease in the non-controlling interest's ownership																	¥ 6,532,152,666	46,236,902	31,854,481
Skyscanner
Business combination disclosures
Purchase consideration	£ 1,400.0	¥ 12,000,000,000
Acquisition consideration in cash																£ 1,200.0	10,000,000,000
Purchase price allocation
Cash acquired																	571,000,000
Net assets																						265,145,209
Deferred tax liabilities																						(620,282,710)
Non-controlling interests																						(315,836,071)
Goodwill																						9,583,716,450
Total purchase consideration																						12,014,156,428
Purchase consideration unpaid				£ 41.0												£ 41.0						361,000,000
Unpaid consideration, payable period	3 years	3 years
Skyscanner \| Trademark and domain
Purchase price allocation
Identifiable intangible assets																						1,981,771,584
Qunar
Business combination disclosures
Purchase consideration					$ 5,103,252,544	¥ 32,541,365,375		¥ 4,500,000,000
Equity interest (as a percent)							45.00%	45.00%
Ownership of share capital held (as a percent)							48.00%	48.00%
Equity interest acquired (as a percent)							45.00%	45.00%
Purchase price allocation
Cash and cash equivalents																						5,169,733,816
Advance to suppliers																						1,177,437,522
Prepayments and other current assets																						3,075,154,225
Long-term investments																						712,967,197
Fixed assets, net																						232,085,350
Other non-current assets																						127,412,235
Accounts payable																						(1,584,668,322)
Taxes payable																						(1,028,960,573)
Short term debts																						(3,884,097,322)
Accrued expenses and other current liabilities																						(4,526,855,580)
Non-current liability																						(93,019,969)
Non-controlling interests																						(5,282,358)
Net assets																						(628,093,779)
Deferred tax liabilities																						(2,489,866,400)
Non-controlling interests																						(17,850,614,771)
Goodwill																						43,563,164,135
Total purchase consideration																						32,541,365,375
Decrease in the non-controlling interest's ownership															¥ 15,500,000,000
Amount of difference between the book value of non-controlling interests and the cash consideration, recorded as additional paid in capital															3,700,000,000
Additional paid-in capital from the newly issued ordinary shares														$ 1,900,000,000	12,700,000,000
Increase (decrease) in goodwill as measurement period adjustment																	582,000,000
Pro forma results
Pro-forma net revenues																	14,812,533,000	8,917,279,000
Pro-forma net loss																	(5,086,934,000)	(1,889,396,000)
Qunar \| Trademark and domain
Purchase price allocation
Identifiable intangible assets																						8,998,429,167
Qunar \| Technology and supplier network for new products
Purchase price allocation
Identifiable intangible assets																						¥ 948,347,023
Weighted average useful life					5 years 2 months 12 days	5 years 2 months 12 days
Qunar \| Baidu
Business combination disclosures
Purchase consideration					$ 3,416,184,974	¥ 21,698,582,100
Shares issued as consideration (in shares) \| shares							11,500,000	11,500,000
Fair value of shares issued as consideration							$ 3,400,000,000	¥ 21,700,000,000
Shares issued for the benefit of employees \| shares			4,000,000
Equity method interest (as a percent)							45.00%	45.00%
Qunar \| Qunar Employees
Business combination disclosures
Purchase consideration					$ 1,687,067,570	¥ 10,842,783,275
Qunar \| Common Class A
Business combination disclosures
Number of shares acquired \| shares							179,000,000	179,000,000
Shares outstanding \| shares							193,000,000	193,000,000
Number of votes per share \| Vote							3	3
Qunar \| Common Class B
Business combination disclosures
Number of shares acquired \| shares							11,000,000	11,000,000
Number of votes per share \| Vote							1	1
Number of shares exchanged for shares issued to employees \| shares			66,000,000
Number of shares deemed to be owned \| shares							256,000,000	256,000,000
Certain investments
Business combination disclosures
Purchase consideration														2,900,000,000	19,000,000,000
Acquisition consideration in cash														$ 1,000,000,000	¥ 6,500,000,000
Travelfusion
Business combination disclosures
Purchase consideration									£ 75.6	¥ 721,000,000
Equity interest (as a percent)										70.00%
Purchase price allocation
Net assets										¥ 36,936,493
Deferred tax liabilities										(72,293,783)
Non-controlling interests										(275,995,802)
Goodwill										687,633,024
Total purchase consideration										¥ 720,536,040
Non-controlling interest percentage (as a percent)										30.00%
Travelfusion \| Trademark and domain
Purchase price allocation
Identifiable intangible assets										¥ 78,058,071
A technology company focusing on hotel customer reviews
Business combination disclosures
Purchase consideration																				¥ 240,000,000
Acquisition consideration in cash																	110,000,000
Purchase price allocation
Net assets													¥ 2,134,170							2,134,170
Deferred tax liabilities													(11,188,000)							(11,188,000)
Previously held equity interest													(129,360,000)
Goodwill													333,320,722							333,320,722
Total purchase consideration													239,658,892							239,658,892
Increase (decrease) in goodwill as measurement period adjustment																	(33,000,000)
A technology company focusing on hotel customer reviews \| System, brand and customer relationship
Purchase price allocation
Identifiable intangible assets													¥ 44,752,000							¥ 44,752,000
A technology company focusing on hotel customer reviews \| Technology and supplier network for new products
Business combination disclosures
Equity interest (as a percent)				35.00%												35.00%					35.00%	35.00%
Purchase price allocation
Gain from the re-measurement of the previously held equity interest to the fair value in the business acquisition																			¥ 100,000,000
An offline travel agency
Business combination disclosures
Purchase consideration											$ 50,000,000	¥ 308,000,000
Equity interest (as a percent)												43.00%							43.00%
Purchase price allocation
Cash acquired												¥ 142,000,000
Net assets												164,411,042							¥ 164,411,042
Deferred tax liabilities												(60,450,000)							(60,450,000)
Non-controlling interests												(370,656,000)							(370,656,000)
Goodwill												331,615,519							331,615,519
Total purchase consideration												306,720,561							306,720,561
Purchase consideration unpaid												196,000,000							196,000,000
Increase (decrease) in goodwill as measurement period adjustment																		(1,000,000)
Decrease in consideration as measurement period adjustment																		¥ 1,000,000
An offline travel agency \| Trademark and domain
Purchase price allocation
Identifiable intangible assets												174,800,000							174,800,000
Others
Purchase price allocation
Purchase consideration unpaid																						¥ 7,000,000
Increase (decrease) in goodwill as measurement period adjustment																	¥ 159,000,000
Supplier relationship \| Skyscanner
Purchase price allocation
Identifiable intangible assets																						928,904,634
Intangible asset useful life				9 years
IT Platform \| Skyscanner
Purchase price allocation
Identifiable intangible assets																						¥ 190,737,332
Intangible asset useful life				6 years
IT Platform \| Travelfusion
Purchase price allocation
Identifiable intangible assets										5,051,377
Intangible asset useful life																5 years	5 years
Customer relationship \| An offline travel agency
Purchase price allocation
Identifiable intangible assets												¥ 67,000,000							¥ 67,000,000
Intangible asset useful life																5 years	5 years
Business Relationship \| Travelfusion
Purchase price allocation
Identifiable intangible assets										¥ 261,146,660
Intangible asset useful life																10 years	10 years

PRINCIPAL ACCOUNTING POLICIES - Goodwill and other intangible assets to sales and marketing (Details)	12 Months Ended
	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)
Intangible assets
Impairment of goodwill	¥ 0	¥ 0	¥ 0
Impairment on other intangible assets	0	0	0
Accrued liability for customer reward program
Accrued liability for customer reward program		593,346,816		$ 94,796,296	¥ 658,170,680
Amount of expenses for group's customers reward program	202,000,000	399,000,000	355,000,000
Allowance for doubtful accounts activity
Balance at beginning of year	38,237,658	14,707,184	5,896,903
Write-offs	(11,735,449)	(8,550,312)	(2,927,299)
Balance at end of period	58,841,826	38,237,658	14,707,184
Sales and marketing
Advertising expenses	¥ 2,800,000,000	¥ 1,800,000,000	¥ 1,200,000,000
Minimum
Intangible assets
Intangible asset useful life	3 years
Maximum
Intangible assets
Intangible asset useful life	10 years

PRINCIPAL ACCOUNTING POLICIES - Share incentive plans (Details)						12 Months Ended
	Nov. 18, 2015 shares	Sep. 22, 2013 shares	Jan. 01, 2013	Dec. 29, 2011 shares	Dec. 28, 2011 shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2016 CNY (¥) shares	Dec. 31, 2015 CNY (¥) shares	Dec. 31, 2014 CNY (¥) shares	Dec. 31, 2013 shares	Nov. 30, 2007 shares	Oct. 17, 2007 shares	Nov. 05, 2004 shares
Share-based compensation disclosures
Number of option outstanding under share incentive plans (in shares)						5,523,515		5,005,461	4,972,178	4,130,732
Number of options granted under share incentive plan						928,002	928,002	625,006	1,472,449
Unrecognized compensation cost \| $						$ 197,000,000
Cash received from exercise of share options						$ 30,494,058	¥ 211,720,242	¥ 52,117,597	¥ 184,579,173
Restricted stock units (RSUs)
Share-based compensation disclosures
Restricted share units granted (shares)						1,183,094	1,183,094	229,603	761,514
Unrecognized compensation cost \| $						$ 244,000,000
Ctrip 2005 Option Plan
Share-based compensation disclosures
Number of ordinary shares reserved for future issuances of options													3,000,000
Number of option outstanding under share incentive plans (in shares)						107,572		179,453
Ctrip 2007 Incentive Plan
Share-based compensation disclosures
Number of option outstanding under share incentive plans (in shares)						5,415,943		4,826,008
Number of ordinary shares authorized												1,000,000
Annual increase of number of ordinary shares authorized												1,000,000
Ctrip 2007 Incentive Plan \| Stock options
Share-based compensation disclosures
Vesting period						4 years	4 years
Ctrip 2007 Incentive Plan \| Stock options \| Employees
Share-based compensation disclosures
Number of options granted under share incentive plan						928,002	928,002	625,006
Ctrip 2007 Incentive Plan \| Restricted stock units (RSUs)
Share-based compensation disclosures
Requisite service period						4 years	4 years
Restricted stock units outstanding (in shares)						1,462,239		865,408
Restriction period						4 years	4 years
Qunar 2007 Share Incentive Plan
Share-based compensation disclosures
Number of ordinary shares authorized											9,600,140
Vesting period						4 years	4 years
Increase in number of shares available for issuance		6,066,896		26,060,000	20,724,362
Percentage of increase in number of shares available for issuance			1.50%
Contractual term (in years)						10 years	10 years
Qunar 2007 Share Incentive Plan \| Vesting one year after date of grant
Share-based compensation disclosures
Vesting percentage						25.00%	25.00%
Qunar 2007 Share Incentive Plan \| Vesting on quarterly basis
Share-based compensation disclosures
Vesting percentage						6.25%	6.25%
Qunar 2007 Share Incentive Plan \| ADS
Share-based compensation disclosures
ADS conversion ratio								0.725
Qunar 2007 Share Incentive Plan \| Stock options
Share-based compensation disclosures
Number of option outstanding under share incentive plans (in shares)						5,535,348		8,596,548
Qunar 2015 Share Incentive Plan \| ADS
Share-based compensation disclosures
ADS conversion ratio	0.725
Qunar 2015 Share Incentive Plan \| Stock options
Share-based compensation disclosures
Number of option outstanding under share incentive plans (in shares)						4,354,575		10,162,890
Number of ordinary shares authorized	28,476,795
Contractual term (in years)	10 years

PRINCIPAL ACCOUNTING POLICIES - Summary of share option activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 30, 2016
Number of Shares
Outstanding, beginning	5,005,461	4,972,178	4,130,732
Granted	928,002	625,006	1,472,449
Exercised	(368,722)	(506,163)	(573,351)
Forfeited/Cancelled	(41,226)	(85,560)	(57,652)
Outstanding, ending	5,523,515	5,005,461	4,972,178	4,130,732
Vested and expect to vest, ending	5,339,880
Exercisable, ending	3,228,073
Weighted Average Exercise Price
Outstanding, beginning (in dollars per share)	$ 122.00	$ 101.03	$ 70.42
Granted (in dollars per share)	322.20	247.91	172.56
Exercised (in dollars per share)	80.70	65.65	62.52
Forfeited (in dollars per share)	199.32	156.32	117.63
Outstanding, ending (in dollars per share)	157.82	$ 122.00	$ 101.03	$ 70.42
Vested and expect to vest, ending (in dollars per share)	155.04
Exercisable, ending (in dollars per share)	$ 100.42
Weighted Average Remaining Contractual Life (Years)
Outstanding	4 years 6 months 15 days	4 years 9 months 7 days	5 years 2 months 1 day	4 years 11 months 27 days
Vested and expect to vest at the end of the period	4 years 5 months 19 days
Exercisable at the end of the period	3 years 1 month 21 days
Aggregate Intrinsic Value
Outstanding	$ 899,966,907	$ 1,244,544,670	$ 405,399,251	$ 528,988,489
Vested and expect to vest	884,674,316
Exercisable	$ 708,809,522
Assumptions
Pre-vesting forfeiture rate assumptions (as a percent)	8.00%
Closing stock price (in dollars per share)					$ 320.00
Total intrinsic value of options exercised	$ 257,000,000	$ 178,000,000	$ 148,000,000
Weighted average fair value of options granted (in dollars per share)	$ 140.95	$ 109.93	$ 78.10
Qunar
Number of Shares
Outstanding, beginning	9,889,923	18,759,438
Granted		1,846,200
Exercised		(9,140,502)
Forfeited/Cancelled		(1,575,213)
Outstanding, ending		9,889,923	18,759,438
Vested and expect to vest, ending	9,241,666
Exercisable, ending	2,107,686
Weighted Average Exercise Price
Outstanding, beginning (in dollars per share)	$ 0.01	$ 0.01
Granted (in dollars per share)		0.01
Exercised (in dollars per share)		0.01
Forfeited (in dollars per share)		0.01
Outstanding, ending (in dollars per share)		$ 0.01	$ 0.01
Vested and expect to vest, ending (in dollars per share)	0.01
Exercisable, ending (in dollars per share)	$ 0.01
Weighted Average Remaining Contractual Life (Years)
Outstanding		8 years 6 months 15 days	9 years 4 months 10 days
Vested and expect to vest at the end of the period	8 years 6 months 11 days
Exercisable at the end of the period	8 years 6 months 7 days
Aggregate Intrinsic Value
Outstanding		$ 99,393,726	$ 329,603,326
Vested and expect to vest	$ 92,878,743
Exercisable	21,182,244
Assumptions
Total intrinsic value of options exercised	$ 92,000,000
Weighted average fair value of options granted (in dollars per share)	$ 19.99

PRINCIPAL ACCOUNTING POLICIES - Summary of outstanding and exercisable options (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 $ / shares	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 $ / shares	Dec. 31, 2014 CNY (¥)
Share-based compensation disclosures by exercise price range
Number of shares, outstanding	5,523,515
Number of shares, exercisable	3,228,073
Assumptions
Weighted average fair value of options granted (in dollars per share) \| $ / shares	$ 140.95		$ 109.93		$ 78.10
Unrecognized compensation cost \| $	$ 197
Weighted average recognized period		2 years 10 months 24 days
Total cash received from the exercise of share options \| ¥		¥ 211,720,242		¥ 52,117,597		¥ 184,579,173
35.00-58.99
Share-based compensation disclosures by exercise price range
Number of shares, outstanding	677,760
Weighted-average exercise price, outstanding (in dollars per share) \| $ / shares	$ 38.02
Weighted-average remaining contractual life (years), outstanding		1 month 6 days
Number of shares, exercisable	677,760
Weighted-average exercise price, exercisable (in dollars per share) \| $ / shares	$ 38.02
Weighted-average remaining contractual life (years), exercisable		1 month 6 days
59.00-77.99
Share-based compensation disclosures by exercise price range
Number of shares, outstanding	1,120,518
Weighted-average exercise price, outstanding (in dollars per share) \| $ / shares	$ 77.12
Weighted-average remaining contractual life (years), outstanding		4 years 4 days
Number of shares, exercisable	892,716
Weighted-average exercise price, exercisable (in dollars per share) \| $ / shares	$ 76.46
Weighted-average remaining contractual life (years), exercisable		3 years 11 months 23 days
78.00-96.99
Share-based compensation disclosures by exercise price range
Number of shares, outstanding	510,008
Weighted-average exercise price, outstanding (in dollars per share) \| $ / shares	$ 91.52
Weighted-average remaining contractual life (years), outstanding		2 years 2 months 9 days
Number of shares, exercisable	510,008
Weighted-average exercise price, exercisable (in dollars per share) \| $ / shares	$ 91.52
Weighted-average remaining contractual life (years), exercisable		2 years 2 months 9 days
97.00-129.99
Share-based compensation disclosures by exercise price range
Number of shares, outstanding	369,445
Weighted-average exercise price, outstanding (in dollars per share) \| $ / shares	$ 105.01
Weighted-average remaining contractual life (years), outstanding		2 years 8 months 16 days
Number of shares, exercisable	369,445
Weighted-average exercise price, exercisable (in dollars per share) \| $ / shares	$ 105.01
Weighted-average remaining contractual life (years), exercisable		2 years 8 months 16 days
130.00- 259.99
Share-based compensation disclosures by exercise price range
Number of shares, outstanding	2,845,784
Weighted-average exercise price, outstanding (in dollars per share) \| $ / shares	$ 236.86
Weighted-average remaining contractual life (years), outstanding		6 years 5 months 16 days
Number of shares, exercisable	778,144
Weighted-average exercise price, exercisable (in dollars per share) \| $ / shares	$ 185.94
Weighted-average remaining contractual life (years), exercisable		5 years 7 months 17 days

PRINCIPAL ACCOUNTING POLICIES - Assumptions used to calculate fair value of share options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based compensation disclosures
Risk-free interest rate, minimum (as a percent)	1.16%	1.35%	1.66%
Risk-free interest rate, maximum (as a percent)	1.66%	1.59%	1.75%
Expected life	5 years	5 years	5 years
Expected dividend yield (as a percent)	0.00%	0.00%	0.00%
Volatility, minimum (as a percent)	48.00%	49.00%	49.00%
Volatility, maximum (as a percent)	51.00%	50.00%	52.00%
Fair value of options at grant date per share	$ 140.95	$ 109.93	$ 78.10
Minimum
Share-based compensation disclosures
Fair value of options at grant date per share	133.85	105.16	74.98
Maximum
Share-based compensation disclosures
Fair value of options at grant date per share	$ 141.72	$ 112.76	$ 109.57
Qunar
Share-based compensation disclosures
Risk-free interest rate, minimum (as a percent)	0.22%
Risk-free interest rate, maximum (as a percent)	2.10%
Volatility, minimum (as a percent)	26.00%
Volatility, maximum (as a percent)	40.00%
Fair value of options at grant date per share	$ 19.99
Qunar \| Minimum
Share-based compensation disclosures
Expected life	1 month 17 days
Qunar \| Maximum
Share-based compensation disclosures
Expected life	6 years

PRINCIPAL ACCOUNTING POLICIES - Summary of RSUs activities (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Weighted Average Exercise Price
Outstanding, beginning (in dollars per share)	$ 122.00	$ 101.03	$ 70.42
Granted (in dollars per share)	322.20	247.91	172.56
Exercised (in dollars per share)	80.70	65.65	62.52
Forfeited (in dollars per share)	199.32	156.32	117.63
Outstanding, ending (in dollars per share)	$ 157.82	$ 122.00	$ 101.03
Unrecognized compensation cost	$ 197.0
Weighted average recognized period	2 years 10 months 24 days
Restricted stock units (RSUs)
Number of Shares
Outstanding at the beginning of the period (in shares)	865,408	1,058,608	623,424
Granted (in shares)	1,183,094	229,603	761,514
Vested (in shares)	(492,825)	(271,683)	(261,692)
Forfeited (in shares)	(93,438)	(151,120)	(64,638)
Outstanding at the end of the period (in shares)	1,462,239	865,408	1,058,608
Weighted Average Exercise Price
Outstanding, beginning (in dollars per share)	$ 185.17	$ 158.55	$ 83.60
Granted (in dollars per share)	301.62	249.31	185.40
Exercised (in dollars per share)	223.00	129.21	86.82
Forfeited (in dollars per share)	237.69	181.47	148.02
Outstanding, ending (in dollars per share)	$ 263.28	$ 185.17	$ 158.55
Share-based compensation expense	$ 217.8	$ 48.6	$ 32.3
Unrecognized compensation cost	$ 244.0
Weighted average recognized period	1 year 8 months 12 days
Ctrip 2007 Incentive Plan
Share-based compensation arrangement by share-based payment award
Number of shares, converted to RSU	1,901,372
Ctrip 2007 Incentive Plan \| Restricted stock units (RSUs)
Share-based compensation arrangement by share-based payment award
Requisite service period	4 years
Converted from option in January 2012 (in shares)	475,343

PRINCIPAL ACCOUNTING POLICIES - Other income/ (expense) (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)
Other income/ (expense)
Foreign exchange gains/(losses)		¥ (557,995,284)	¥ 12,638,982	¥ (55,930,392)
Bank charges		(101,973,794)	(61,150,707)	(49,713,255)
Loss from impairment of long-term investment (Note 8)	$ (6,911,549)	(47,986,882)	0	(33,000,000)
Subsidy income		220,631,285	199,418,778	132,094,928
Gain on disposal of cost method investment (Note 8)		149,066,258
Gain on disposal of available-for-sale investment (Note 8)	20,258,067	140,651,759
Dividends from long-term investment		48,911,066		39,036,138
Reimbursement from the depository		46,345,221	11,582,882
Gain on deconsolidation of subsidiaries	36,296	252,000	2,294,451,702	789,193
Loss on disposal of a subsidiary				(1,529,046)
Others		75,250,084	24,038,193	12,073,069
Total	$ (3,866,958)	¥ (26,848,287)	¥ 2,480,979,830	¥ 43,820,635

PRINCIPAL ACCOUNTING POLICIES - Statutory reserves and dividends (Details) - CNY (¥) ¥ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
China
Statutory reserves disclosures
Portion of after-tax profit to be allocated to general reserve under PRC law (as a percent)	10.00%
Maximum percentage of statutory general reserve related to entity's registered capital	50.00%
Appropriations to statutory reserves	¥ 69.0	¥ 35.0	¥ 16.0
Dividends
Restricted net assets of company's PRC subsidiaries and VIEs not distributable in form of dividends to parent	5,000.0
Accumulated profit of subsidiaries in PRC distributable in form of dividends to parent	¥ 8,200.0	¥ 7,200.0	¥ 5,000.0
Withholding tax rate for dividends distributed by foreign invested enterprise to their immediate holding companies outside mainland china (as a percent)	10.00%
Taiwan
Statutory reserves disclosures
Portion of after-tax profit to be allocated to general reserve under PRC law (as a percent)	10.00%

PRINCIPAL ACCOUNTING POLICIES - Earnings/(loss) per share, treasury stock and segment reporting (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 item	Dec. 31, 2015	Nov. 30, 2015	Apr. 03, 2014 USD ($)
Treasury stock disclosures
Approved repurchase plan \| $				$ 600
Segment reporting disclosures
Number of reportable segments \| item	1
ADS
Treasury stock disclosures
Ratio of ADSs to ordinary shares		8	4

PREPAYMENTS AND OTHER CURRENT ASSETS (Details)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)
PREPAYMENTS AND OTHER CURRENT ASSETS
Prepayments and deposits to vendors		¥ 5,082,058,275	¥ 5,527,802,541
Prepaid expenses		439,983,044	262,797,329
Receivables from financial institution		207,182,863	221,221,736
Employee advances		99,042,188	453,304,997
Interest receivable		81,999,660	71,558,995
Others		296,719,656	213,280,229
Total	$ 893,991,889	¥ 6,206,985,686	¥ 6,749,965,827

LONG-TERM DEPOSITS AND PREPAYMENTS (Details)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)
LONG-TERM DEPOSITS AND PREPAYMENTS
Prepayments for purchase of long lived assets		¥ 625,084,070	¥ 120,699,207
Deposits paid to airline suppliers		244,072,331	141,890,707
Deposits paid to hotel suppliers		126,728,198	118,851,829
Deposits paid to lessors		21,615,099	40,360,900
Deposits paid to travel bureau		5,551,278	2,586,292
Others		124,228,221	62,397,033
Total	$ 165,242,575	¥ 1,147,279,197	¥ 486,785,968

LONG-TERM LOAN RECEIVABLE (Details)	1 Months Ended				12 Months Ended
LONG-TERM LOAN RECEIVABLE (Details)	Oct. 31, 2016 CNY (¥)	Feb. 29, 2016 USD ($)	Feb. 29, 2016 CNY (¥)	Apr. 30, 2015 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2013 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)
Long-term loan receivable
Amount of loan					$ 31,063,381				¥ 215,673,057	¥ 578,524,154
Felicity
Long-term loan receivable
Amount of loan								$ 29,500,000
Term of the loan								5 years
Repayment of loans		$ 31,000,000	¥ 212,000,000
A Subsidiary of Felicity
Long-term loan receivable
Amount of loan						$ 300,000,000
Interest rate (as a percent)					5.00%				5.00%
Term of the loan					2 years
Repayment of loans						140,000,000
Facility drawn						$ 140,000,000	¥ 872,000,000
Unused loan facility					$ 160,000,000
eHi
Long-term loan receivable
Amount of loan \| ¥				¥ 300,000,000					¥ 102,000,000
Term of the loan				3 years
Felicity
Long-term loan receivable
Interest rate (as a percent)								5.00%
eHi
Long-term loan receivable
Interest rate (as a percent)				6.90%
Repayment of loans \| ¥	¥ 200,000,000

LAND USE RIGHTS (Details)	12 Months Ended
LAND USE RIGHTS (Details)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)	Dec. 31, 2016 USD ($) m² item	Dec. 31, 2016 CNY (¥) m² item
Intangible assets
Amortization expense	¥ 255,000,000	¥ 58,000,000	¥ 5,000,000
Net book value		102,328,181		$ 14,337,429	¥ 99,544,772
Land use rights
Intangible assets
Number of land use rights \| item				3	3
Amortization expense	¥ 3,000,000	¥ 2,000,000	¥ 3,000,000
Land use rights \| Shanghai
Intangible assets
Cost					¥ 68,000,000
Square meters \| m²				17,000	17,000
Useful life	50 years
Land use rights \| Nantong
Intangible assets
Cost					¥ 49,000,000
Square meters \| m²				19,500	19,500
Useful life	40 years
Land use rights \| Chengdu
Intangible assets
Cost					¥ 10,000,000
Square meters \| m²				9,000	9,000
Useful life	50 years

PROPERTY, EQUIPMENT AND SOFTWARE (Details)	12 Months Ended
PROPERTY, EQUIPMENT AND SOFTWARE (Details)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)	Dec. 31, 2016 CNY (¥)
Property, equipment and software
Less: accumulated depreciation and amortization			¥ (772,268,598)		¥ (1,253,759,503)
Total net book value	$ 805,409,777		5,555,959,499		5,591,960,081
Depreciation	$ 66,454,148	¥ 461,391,147	255,966,352	¥ 173,786,973
Building
Property, equipment and software
Original value			5,048,349,531		5,148,644,010
Computer equipment
Property, equipment and software
Original value			534,734,639		731,530,644
Website-related equipment
Property, equipment and software
Original value			377,457,565		536,705,335
Furniture and fixtures
Property, equipment and software
Original value			125,609,830		178,703,320
Software
Property, equipment and software
Original value			101,444,245		124,082,233
Leasehold improvements
Property, equipment and software
Original value			129,401,013		115,997,785
Construction in progress
Property, equipment and software
Original value			¥ 11,231,274		¥ 10,056,257

INVESTMENTS - Long-term investments (Details)	1 Months Ended
INVESTMENTS - Long-term investments (Details)	Sep. 30, 2015 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)
INVESTMENTS
Held to maturity investment - Long-term time deposit			¥ 1,059,812,729	¥ 1,020,425,292
Others- cost method investments			891,333,247	988,268,166
Total net book value		$ 2,957,341,548	20,532,822,365	13,870,523,498
Held to maturity investment
INVESTMENTS
Term of time deposit	3 years
Payments for time deposit	¥ 1,000,000,000
Interest rate of time deposit (as a percent)	3.90%
China Eastern Airline
INVESTMENTS
Available-for-sale investments- measured at fair value			3,293,478,259
Tujia
INVESTMENTS
Available-for-sale investments- measured at fair value			3,081,585,780	2,876,749,196
Hanting
INVESTMENTS
Available-for-sale investments- measured at fair value			1,984,037,413	1,116,231,309
eLong
INVESTMENTS
Available-for-sale investments- measured at fair value			1,877,945,423
Value of the investment at the date prior to the consolidation			235,138,072	2,632,145,397
LY.com
INVESTMENTS
Available-for-sale investments- measured at fair value			1,523,436,120	1,745,309,616
MakeMyTrip
INVESTMENTS
Available-for-sale investments- measured at fair value			1,519,309,068
eHi
INVESTMENTS
Available-for-sale investments- measured at fair value			612,309,518	793,869,127
Tuniu
INVESTMENTS
Available-for-sale investments- measured at fair value			252,746,139	430,659,093
Easy Go
INVESTMENTS
Available-for-sale investments- measured at fair value			228,317,887	527,301,676
Investment funds
INVESTMENTS
Value of the investment at the date prior to the consolidation			616,160,937	261,520,937
BTG
INVESTMENTS
Value of the investment at the date prior to the consolidation			2,498,763,234
Home Inns
INVESTMENTS
Value of the investment at the date prior to the consolidation				961,773,378
Others
INVESTMENTS
Available-for-sale investments- measured at fair value			94,311,000	316,742,816
Value of the investment at the date prior to the consolidation			¥ 764,137,539	¥ 199,527,495

INVESTMENTS - China Eastern Airlines Limited (Details) ¥ / shares in Units, ¥ in Millions, shares in Millions	1 Months Ended	12 Months Ended
	Apr. 30, 2016 CNY (¥) shares	Dec. 31, 2016 CNY (¥) ¥ / shares	Dec. 30, 2016 $ / shares
Investment transaction disclosures
Closing stock price (in dollars per share) \| $ / shares			$ 320.00
China Eastern Airline
Investment transaction disclosures
Shares purchased (in shares) \| shares	466
Purchase of shares, cost of share aggregate	¥ 3,000
Percentage of equity interest purchased	3.00%
Closing stock price (in dollars per share) \| ¥ / shares		¥ 7.07
Fair value of available-for-sale investment		¥ 3,300
Unrealized gain recorded in other comprehensive income		¥ 293

INVESTMENTS - Tujia (Details)	1 Months Ended		12 Months Ended
INVESTMENTS - Tujia (Details)	Jul. 31, 2015 USD ($)	Jul. 31, 2015 CNY (¥)	Dec. 31, 2016 USD ($) shares	Dec. 31, 2016 CNY (¥) shares	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)
INVESTMENTS
Gain on deconsolidation of subsidiaries			$ 36,296	¥ 252,000	¥ 2,294,451,702	¥ 789,193
Tujia
INVESTMENTS
Percentage of interest after sale of redeemable convertible preferred shares	45.00%	45.00%
Gain on deconsolidation of subsidiaries	$ 350,000,000	¥ 2,300,000,000
Fair value of available-for-sale investment \| ¥		¥ 2,800,000,000
Tujia \| Redeemable convertible preferred stock
INVESTMENTS
Number of shares held \| shares			101,498,094	101,498,094

INVESTMENTS- Hanting (Details) $ / shares in Units, $ in Millions, ¥ in Billions	12 Months Ended
	Dec. 31, 2016 CNY (¥)	Dec. 31, 2010 USD ($) shares	Dec. 31, 2010 CNY (¥) shares	Dec. 31, 2016 USD ($) $ / shares	Dec. 31, 2016 CNY (¥)	Dec. 30, 2016 $ / shares
Investment transaction disclosures
Closing price of ADS (in dollars per share)						$ 320.00
Hanting
Investment transaction disclosures
Number of shares held \| shares		22,049,446	22,049,446
Percentage of equity interest		9.00%	9.00%
Purchase of shares, cost of share aggregate		$ 67.5	¥ 0.5
Fair value of available-for-sale investment				$ 286.0	¥ 2.0
Unrealized gain recorded in other comprehensive income \| ¥	¥ 1.5
Hanting \| ADS
Investment transaction disclosures
Closing price of ADS (in dollars per share)				$ 51.84

INVESTMENTS- LY.com (Details) - LY.com $ in Millions, ¥ in Billions	1 Months Ended	12 Months Ended
	Apr. 30, 2014 CNY (¥)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)
Investment transaction disclosures
Purchase of shares, cost of share aggregate	¥ 1.4
Fair value of available-for-sale investment			$ 219	¥ 1.5
Unrealized gain recorded in other comprehensive income		¥ 0.1

INVESTMENTS - MakeMyTrip (Details) $ / shares in Units, $ in Millions, ¥ in Billions		1 Months Ended
	Dec. 31, 2016 CNY (¥)	Jan. 31, 2016 USD ($) director shares	Jan. 31, 2016 CNY (¥) director shares	Dec. 31, 2016 USD ($) $ / shares	Dec. 31, 2016 CNY (¥)	Dec. 30, 2016 $ / shares
Investment transaction disclosures
Closing stock price (in dollars per share) \| $ / shares						$ 320.00
MakeMyTrip
Investment transaction disclosures
Purchase of shares, cost of share aggregate		$ 180	¥ 1.2
Bonds converted into Ordinary Shares \| shares		9,857,028	9,857,028
Percentage of equity interest		10.00%	10.00%
Number of board seats appointed \| director		1	1
Total number of seats \| director		10	10
Closing stock price (in dollars per share) \| $ / shares				$ 22.20
Fair value of available-for-sale investment				$ 219	¥ 1.5
Unrealized gain recorded in other comprehensive income \| ¥	¥ 0.3

INVESTMENTS - eHi (Details) $ / shares in Units, ¥ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares	Dec. 31, 2016 CNY (¥)	Dec. 31, 2016 CNY (¥)	Dec. 30, 2016 $ / shares
INVESTMENTS
Closing stock price (in dollars per share)				$ 320.00
eHi
INVESTMENTS
Percentage of equity interest	14.00%		14.00%
Voting power interest held (as a percent)	19.60%		19.60%
Payments made for investment	$ 107	¥ 700
Fair value of available-for-sale investment	$ 88		¥ 612
Increase (decrease) in fair value of the investment credited to other comprehensive income \| ¥		¥ 100
eHi \| ADS
INVESTMENTS
Closing stock price (in dollars per share)	$ 9.06

INVESTMENTS - Tuniu (Details) $ / shares in Units, ¥ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares	Dec. 31, 2016 CNY (¥)	Dec. 31, 2016 CNY (¥)	Dec. 30, 2016 $ / shares
INVESTMENTS
Closing stock price (in dollars per share)				$ 320.00
Tuniu
INVESTMENTS
Percentage of equity interest	4.00%		4.00%
Payments made for investment	$ 50	¥ 300
Fair value of available-for-sale investment	$ 36		¥ 253
Increase (decrease) in fair value of the investment credited to other comprehensive income \| ¥		¥ 94
Tuniu \| ADS
INVESTMENTS
Closing stock price (in dollars per share)	$ 8.75

INVESTMENTS - Easy Go (Details) shares in Millions	1 Months Ended				12 Months Ended
INVESTMENTS - Easy Go (Details) shares in Millions	Feb. 29, 2016 USD ($) shares	Feb. 29, 2016 CNY (¥) shares	Aug. 31, 2014 CNY (¥)	Dec. 31, 2013 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2016 CNY (¥)
INVESTMENTS
Consideration of the sale of investment					$ 55,075,256	¥ 382,387,499	¥ 61,980,000
Easy Go
INVESTMENTS
Payments made for investment			¥ 324,000,000	$ 53,000,000
Number of securities disposed \| shares	6	6
Consideration of the sale of investment	$ 49,000,000	¥ 317,000,000
Gain on sale of securities reclassified from other comprehensive income	$ 23,000,000	¥ 135,000,000
Fair value of available-for-sale investment					$ 33,000,000			¥ 228,000,000
Increase (decrease) in fair value of the investment credited to other comprehensive income \| ¥						¥ 44,000,000

INVESTMENTS - Other-than-temporary impairment (Details)	12 Months Ended
INVESTMENTS - Other-than-temporary impairment (Details)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)
INVESTMENTS
Loss from impairment of long-term investment (Note 9)	$ 6,911,549	¥ 47,986,882	¥ 0	¥ 33,000,000
Other income/ (expense)
INVESTMENTS
Other than temporary investment impairment (available-for-sale)		36,000,000		¥ 33,000,000
Other than temporary investment impairment (cost method)		¥ 12,000,000

INVESTMENTS - Homeinns and BTG (Details)	12 Months Ended
INVESTMENTS - Homeinns and BTG (Details)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥) director shares	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)
Equity method investment disclosures
Equity in income/(loss) of affiliates	$ 86,689,209	¥ 601,883,179	¥ (135,780,312)	¥ 187,191,141
Equity in income, including exchange gain and equity share of net income				¥ 646,012,004
Homeinns
Equity method investment disclosures
Equity method investment, ownership interest (as a percent)		15.00%
Number of shares held \| shares		14,400,765
Equity in income/(loss) of affiliates		¥ 1,369,000
Equity in income, including exchange gain and equity share of net income		¥ 1,409,000
BTG
Equity method investment disclosures
Equity method investment, ownership interest (as a percent)		22.00%
Number of shares held \| shares		104,901,899
Fair value of available-for-sale investment		¥ 2,500,000,000
Number of board seats appointed \| director		1
Number Of Board Of Directors Seats \| director		11

INVESTMENTS - Qunar (Details)		12 Months Ended
INVESTMENTS - Qunar (Details)	Dec. 10, 2015 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)
Equity method investment disclosures
Share of cumulative loss		$ 86,689,209	¥ 601,883,179	¥ (135,780,312)	¥ 187,191,141
Qunar
Equity method investment disclosures
Share of cumulative loss				¥ 2,400,000,000
Equity interest prior to consolidation (as a percent)	48.00%
Gain from the re-measurement of the previously held equity interest to the fair value in the business acquisition	¥ 2,400,000,000
Foreign currency translation	¥ 400,000,000

INVESTMENTS - eLong (Details)	1 Months Ended	4 Months Ended	8 Months Ended	12 Months Ended
INVESTMENTS - eLong (Details)	May 31, 2015 USD ($)	Apr. 30, 2016 CNY (¥)	Dec. 31, 2016 CNY (¥) director item	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥) director item	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)
Value booked under equity method
Share of cumulative loss				$ 86,689,209	¥ 601,883,179	¥ (135,780,312)	¥ 187,191,141
Net loss				$ 235,666,263	¥ 1,636,230,855	(2,399,395,247)	(91,622,345)
Gain/(loss) on equity dilution							20,577,432
eLong
Equity method investment disclosures
Equity method investment, ownership interest (as a percent)	38.00%
Payments made for investment \| $	$ 422,000,000
Number of seats allocated \| item			1		1
Total number of seats \| director			8		8
Investment cost		¥ 2,732,852,735	¥ 2,545,486,916		¥ 2,732,852,735	2,615,954,303
Transfer out to Available-for-sale investments			(1,778,322,045)
Foreign currency translation		70,917,988	33,536,784			116,898,432
Total investment cost		2,803,770,723	800,701,655		800,701,655	2,732,852,735	¥ 2,615,954,303
Value booked under equity method
Share of cumulative loss		(255,175,523)	(563,698,613)		722,000,000	(98,560,550)
Amortization of outside difference, net of tax		(3,108,284)	(1,864,970)			(2,146,788)
Total booked value under equity method		(258,283,807)	(565,563,583)			(100,707,338)
Net book value		¥ 2,545,486,916	¥ 235,138,072		235,138,072	¥ 2,632,145,397
Gain/(loss) on equity dilution					1,000,000
eLong \| eLong
Value booked under equity method
Net loss					¥ 1,635,000,000

INVESTMENTS - Unaudited condensed financial information of equity investments (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)
Investment transaction disclosures
Share of cumulative loss	$ 86,689,209	¥ 601,883,179	¥ (135,780,312)	¥ 187,191,141
Operating data:
Revenue				6,667,675,419
Gross profit				1,280,767,842
Income from operations				646,012,004
Net income/(loss)				446,181,771
Net income/(loss) attributable to our equity method investments companies				66,427,909
Add: Equity dilution impact				20,577,432
Add: Gain/(loss) from disposal of equity investments, including the remeasurement gain/(loss) from previously held equity investments in step acquisitions				100,185,800
Equity in income/(loss) of affiliates	$ 86,689,209	601,883,179	(135,780,312)	187,191,141
Balance sheet data:
Current assets				1,383,806,709
Long-term assets				9,377,157,121
Current liabilities				1,771,565,291
Long-term liabilities				3,549,170,630
Non-controlling interests				¥ 15,188,000
eLong
Investment transaction disclosures
Share of cumulative loss		(723,140,052)
Operating data:
Revenue		1,895,409,404
Gross profit		997,644,227
Income from operations		(1,312,847,794)
Net income/(loss)		(1,635,384,928)
Net income/(loss) attributable to our equity method investments companies		(722,307,716)
Add: Equity dilution impact		(832,336)
Equity in income/(loss) of affiliates		(723,140,052)
Balance sheet data:
Current assets		1,978,681,514
Long-term assets		454,710,971
Current liabilities		1,687,293,575
Long-term liabilities		15,970,032
Non-controlling interests		15,512,748
Qunar
Operating data:
Revenue			841,814,520
Gross profit			537,240,212
Income from operations			(4,792,664,736)
Net income/(loss)			(4,917,200,749)
Net income/(loss) attributable to our equity method investments companies			(2,352,388,839)
Add: Gain/(loss) from disposal of equity investments, including the remeasurement gain/(loss) from previously held equity investments in step acquisitions			2,352,388,839
Balance sheet data:
Current assets			9,433,080,372
Long-term assets			1,072,464,782
Current liabilities			10,442,341,153
Long-term liabilities			93,019,969
Non-controlling interests			5,282,358
Others
Investment transaction disclosures
Share of cumulative loss		1,325,023,231	(135,780,312)
Operating data:
Revenue		5,917,850,003	7,069,224,177
Gross profit		4,785,282,088	1,581,396,551
Income from operations		155,471,096	(20,961,158)
Net income/(loss)		(62,190,299)	(189,461,030)
Net income/(loss) attributable to our equity method investments companies		(55,314,772)	(127,465,948)
Add: Equity dilution impact		11,027,933	(8,314,364)
Add: Gain/(loss) from disposal of equity investments, including the remeasurement gain/(loss) from previously held equity investments in step acquisitions		1,369,310,070
Equity in income/(loss) of affiliates		1,325,023,231	(135,780,312)
Balance sheet data:
Current assets		3,353,714,017	4,091,410,052
Long-term assets		17,298,415,142	10,102,034,376
Current liabilities		11,595,906,780	4,043,523,264
Long-term liabilities		1,650,938,946	466,730,372
Non-controlling interests		1,944,540,518	76,928,317
Investment funds
Investment transaction disclosures
Share of cumulative loss		17,000,000	0
Equity method loss from other equity method investments		67,000,000	77,000,000
Operating data:
Equity in income/(loss) of affiliates		¥ 17,000,000	¥ 0

INVESTMENTS - Cost method investments (Details) $ in Millions	1 Months Ended		12 Months Ended
	Feb. 29, 2016 USD ($)	Feb. 29, 2016 CNY (¥)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)
Other- cost method investments
Others- cost method investments			¥ 891,333,247	¥ 988,268,166
Gain on disposal of cost method investment			¥ 149,066,258
Keystone
Other- cost method investments
Others- cost method investments		¥ 167,000,000
Cost method investment percentage	4.00%	4.00%
Proceeds from disposal of cost method investments	$ 48	¥ 316,000,000
Keystone \| Other income/ (expense)
Other- cost method investments
Gain on disposal of cost method investment		¥ 149,000,000

FAIR VALUE MEASUREMENT (Details)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 CNY (¥)	Jul. 31, 2015 CNY (¥)
Fair value measurement
Short-term investment	$ 2,032,674,966	¥ 14,112,862,288		¥ 8,235,785,516
China Eastern Airline
Fair value measurement
Available-for-sale investments		3,300,000,000
Tujia
Fair value measurement
Available-for-sale investments					¥ 2,800,000,000
Hanting
Fair value measurement
Available-for-sale investments	286,000,000	2,000,000,000
LY.com
Fair value measurement
Available-for-sale investments	219,000,000	1,500,000,000
eHi
Fair value measurement
Available-for-sale investments	88,000,000	612,000,000
Easy Go
Fair value measurement
Available-for-sale investments	33,000,000	228,000,000
Tuniu
Fair value measurement
Available-for-sale investments	36,000,000	253,000,000
MakeMyTrip
Fair value measurement
Available-for-sale investments	219,000,000	1,500,000,000
Measured on recurring basis
Fair value measurement
Available-for-sale investments	4,269,069,801	29,640,151,624	$ 2,608,508,915	16,897,399,041
Measured on recurring basis \| China Eastern Airline
Fair value measurement
Available-for-sale investments	474,359,536	3,293,478,259
Measured on recurring basis \| Tujia
Fair value measurement
Available-for-sale investments	443,840,671	3,081,585,780	444,093,550	2,876,749,196
Measured on recurring basis \| Hanting
Fair value measurement
Available-for-sale investments	285,760,826	1,984,037,413	172,316,421	1,116,231,309
Measured on recurring basis \| eLong
Fair value measurement
Available-for-sale investments	270,480,401	1,877,945,423
Measured on recurring basis \| LY.com
Fair value measurement
Available-for-sale investments	219,420,441	1,523,436,120	269,429,377	1,745,309,616
Measured on recurring basis \| eHi
Fair value measurement
Available-for-sale investments	88,190,914	612,309,518	122,552,275	793,869,127
Measured on recurring basis \| Easy Go
Fair value measurement
Available-for-sale investments	32,884,616	228,317,887	81,401,352	527,301,676
Measured on recurring basis \| Tuniu
Fair value measurement
Available-for-sale investments	36,403,016	252,746,139	66,482,308	430,659,093
Measured on recurring basis \| MakeMyTrip
Fair value measurement
Available-for-sale investments	218,826,022	1,519,309,068
Measured on recurring basis \| Others
Fair value measurement
Available-for-sale investments	13,583,609	94,311,000	48,896,665	316,742,816
Measured on recurring basis \| Financial products
Fair value measurement
Short-term investment	1,211,910,189	8,414,292,445	1,225,263,112	7,937,009,389
Measured on recurring basis \| Time deposits
Fair value measurement
Short-term investment	$ 973,409,560	6,758,382,572	$ 178,073,855	1,153,526,819
Measured on recurring basis \| Level 1
Fair value measurement
Available-for-sale investments		7,661,880,397		2,340,759,529
Measured on recurring basis \| Level 1 \| China Eastern Airline
Fair value measurement
Available-for-sale investments		3,293,478,259
Measured on recurring basis \| Level 1 \| Hanting
Fair value measurement
Available-for-sale investments		1,984,037,413		1,116,231,309
Measured on recurring basis \| Level 1 \| eHi
Fair value measurement
Available-for-sale investments		612,309,518		793,869,127
Measured on recurring basis \| Level 1 \| Tuniu
Fair value measurement
Available-for-sale investments		252,746,139		430,659,093
Measured on recurring basis \| Level 1 \| MakeMyTrip
Fair value measurement
Available-for-sale investments		1,519,309,068
Measured on recurring basis \| Level 2
Fair value measurement
Short-term investment		15,172,675,017		9,090,536,208
Measured on recurring basis \| Level 2 \| Financial products
Fair value measurement
Short-term investment		8,414,292,445		7,937,009,389
Measured on recurring basis \| Level 2 \| Time deposits
Fair value measurement
Short-term investment		6,758,382,572		1,153,526,819
Measured on recurring basis \| Level 3
Fair value measurement
Available-for-sale investments		6,805,596,210		5,466,103,304
Measured on recurring basis \| Level 3 \| Tujia
Fair value measurement
Available-for-sale investments		3,081,585,780		2,876,749,196
Measured on recurring basis \| Level 3 \| eLong
Fair value measurement
Available-for-sale investments		1,877,945,423
Measured on recurring basis \| Level 3 \| LY.com
Fair value measurement
Available-for-sale investments		1,523,436,120		1,745,309,616
Measured on recurring basis \| Level 3 \| Easy Go
Fair value measurement
Available-for-sale investments		228,317,887		527,301,676
Measured on recurring basis \| Level 3 \| Others
Fair value measurement
Available-for-sale investments		¥ 94,311,000		¥ 316,742,816

FAIR VALUE MEASUREMENT - Roll forward of level 3 companies investment (Details) - Level 3	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)
eLong
Roll forward of Level 3 investment
Effect of exchange rate change		¥ 98,468,430
Transfer in and/or out of level 3		1,778,322,045
The change in fair value of investment		1,154,948
Fair value of Level 3 investment, ending balance	$ 270,480,401	1,877,945,423
LY.com
Roll forward of Level 3 investment
Fair value of Level 3 investment, beginning balance		1,745,309,616	¥ 1,547,844,523
The change in fair value of investment		(221,873,496)	197,465,093
Fair value of Level 3 investment, ending balance	219,420,441	1,523,436,120	1,745,309,616
Easy Go
Roll forward of Level 3 investment
Fair value of Level 3 investment, beginning balance		527,301,676	627,905,501
Effect of exchange rate change		18,277,885	13,372,961
Disposal of investment		(317,261,674)
The change in fair value of investment			(113,976,786)
Fair value of Level 3 investment, ending balance	32,884,616	228,317,887	527,301,676
Others
Roll forward of Level 3 investment
Fair value of Level 3 investment, beginning balance		316,742,816	207,514,062
Effect of exchange rate change		4,847,716	7,103,210
Transfer in and/or out of level 3		(190,921,630)	94,928,814
Other than temporary impairment		(36,357,902)
The change in fair value of investment			7,196,730
Fair value of Level 3 investment, ending balance	13,583,609	94,311,000	316,742,816
Available-for-sale securities. \| Tujia
Roll forward of Level 3 investment
Fair value of Level 3 investment, beginning balance		2,876,749,196
Effect of exchange rate change		203,797,833	53,534,169
Transfer in and/or out of level 3			2,784,302,479
The change in fair value of investment		1,038,751	38,912,548
Fair value of Level 3 investment, ending balance	$ 443,840,671	¥ 3,081,585,780	¥ 2,876,749,196

FAIR VALUE MEASUREMENT - Significant unobservable inputs (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)
Significant unobservable inputs used in the valuation
Loss from impairment of long-term investment (Note 9)	$ 6,911,549	¥ 47,986,882	¥ 0	¥ 33,000,000
Tujia
Significant unobservable inputs used in the valuation
Weighted average cost of capital (as a percent)	18.00%	18.00%
Terminal growth rate (as a percent)	3.00%	3.00%
LoMD (as a percent)	20.00%	20.00%
Time to liquidation	2 years 9 months 18 days	2 years 9 months 18 days
Risk-free rate (as a percent)	3.50%	3.50%
Expected volatility (as a percent)	42.00%	42.00%
Dividend yield (as a percent)
Tujia \| Liquidation scenario
Significant unobservable inputs used in the valuation
Probability (as a percent)	30.00%	30.00%
Tujia \| Redemption scenario
Significant unobservable inputs used in the valuation
Probability (as a percent)	30.00%	30.00%
Tujia \| IPO scenario
Significant unobservable inputs used in the valuation
Probability (as a percent)	40.00%	40.00%
eLong
Significant unobservable inputs used in the valuation
Weighted average cost of capital (as a percent)	14.50%	14.50%
Terminal growth rate (as a percent)	3.00%	3.00%
LoMD (as a percent)	18.00%	18.00%
Time to liquidation	5 years	5 years
Risk-free rate (as a percent)	1.93%	1.93%
Expected volatility (as a percent)	46.10%	46.10%
Dividend yield (as a percent)
eLong \| Liquidation scenario
Significant unobservable inputs used in the valuation
Probability (as a percent)	30.00%	30.00%
eLong \| Redemption scenario
Significant unobservable inputs used in the valuation
Probability (as a percent)	30.00%	30.00%
eLong \| IPO scenario
Significant unobservable inputs used in the valuation
Probability (as a percent)	40.00%	40.00%
LY.com
Significant unobservable inputs used in the valuation
Weighted average cost of capital (as a percent)	17.00%	17.00%
Terminal growth rate (as a percent)	3.00%	3.00%
LoMD (as a percent)	15.00%	15.00%
Time to liquidation	3 years	3 years
Risk-free rate (as a percent)	2.74%	2.74%
Expected volatility (as a percent)	46.00%	46.00%
Dividend yield (as a percent)
LY.com \| Liquidation scenario
Significant unobservable inputs used in the valuation
Probability (as a percent)	70.00%	70.00%
LY.com \| IPO scenario
Significant unobservable inputs used in the valuation
Probability (as a percent)	30.00%	30.00%
Easy Go
Significant unobservable inputs used in the valuation
Dividend yield (as a percent)
Easy Go \| Minimum
Significant unobservable inputs used in the valuation
Dividend yield (as a percent)
Easy Go \| Maximum
Significant unobservable inputs used in the valuation
Weighted average cost of capital (as a percent)	28.00%	28.00%
Terminal growth rate (as a percent)	3.00%	3.00%
LoMD (as a percent)	20.00%	20.00%
Time to liquidation	2 years	2 years
Risk-free rate (as a percent)	1.27%	1.27%
Expected volatility (as a percent)	45.20%	45.20%
Dividend yield (as a percent)
Easy Go \| Liquidation scenario \| Maximum
Significant unobservable inputs used in the valuation
Probability (as a percent)	60.00%	60.00%
Easy Go \| IPO scenario \| Maximum
Significant unobservable inputs used in the valuation
Probability (as a percent)	40.00%	40.00%
Available-for-sale securities.
Significant unobservable inputs used in the valuation
Dividend yield (as a percent)
Available-for-sale securities. \| Tujia
Significant unobservable inputs used in the valuation
Dividend yield (as a percent)
Available-for-sale securities. \| LY.com
Significant unobservable inputs used in the valuation
Dividend yield (as a percent)
Available-for-sale securities. \| Easy Go
Significant unobservable inputs used in the valuation
Dividend yield (as a percent)

GOODWILL (Details)	12 Months Ended
GOODWILL (Details)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)
Changes in the carrying amount of goodwill
Balance at beginning of year		¥ 45,690,440,903	¥ 1,892,507,708
Balance at end of period	$ 8,067,864,841	56,015,185,590	45,690,440,903
Skyscanner
Changes in the carrying amount of goodwill
Acquisition (Disposal)		9,583,716,450
Balance at end of period		9,583,716,450
Qunar
Changes in the carrying amount of goodwill
Acquisition (Disposal)		582,240,644	42,980,923,491
Balance at end of period		43,563,164,135
Travelfusion
Changes in the carrying amount of goodwill
Acquisition (Disposal)			687,633,024
An offline travel agency in 2014 and measurement period adjustment in 2015
Changes in the carrying amount of goodwill
Acquisition (Disposal)			945,561
Technology company focusing on hotel customer reviews in 2014 and measurement period adjustment in 2015
Changes in the carrying amount of goodwill
Acquisition (Disposal)			(33,564,000)
Others
Changes in the carrying amount of goodwill
Acquisition (Disposal) of others		¥ 158,787,593	¥ 161,995,119

INTANGIBLE ASSETS (Details) - CNY (¥)	12 Months Ended
INTANGIBLE ASSETS (Details) - CNY (¥)	Dec. 31, 2016	Dec. 31, 2015
Intangible assets disclosures
Intangible assets	¥ 14,278,779,458	¥ 11,107,215,032
Less: accumulated amortization	(354,009,527)	(99,299,861)
Net book value	13,924,769,931	11,007,915,171
Trademark and domain
Intangible assets disclosures
Intangible assets not subject to amortization	11,613,475,256	9,631,703,672
Net book value - intangible assets not subject to amortization	11,613,475,256	9,631,703,672
Others
Intangible assets disclosures
Intangible assets not subject to amortization	22,140,607	21,936,321
Net book value - intangible assets not subject to amortization	¥ 22,140,607	21,936,321
Minimum
Intangible assets disclosures
Intangible asset useful life	3 years
Maximum
Intangible assets disclosures
Intangible asset useful life	10 years
Customer relationship
Intangible assets disclosures
Intangible assets to be amortized	¥ 101,042,578	96,942,578
Less: accumulated amortization	(49,086,468)	(31,250,912)
Net book value - intangible assets to be amortized	¥ 51,956,110	65,691,666
Customer relationship \| Minimum
Intangible assets disclosures
Intangible asset useful life	3 years
Customer relationship \| Maximum
Intangible assets disclosures
Intangible asset useful life	10 years
Business Relationship
Intangible assets disclosures
Intangible assets to be amortized	¥ 1,815,034,491	878,529,857
Less: accumulated amortization	(175,130,119)	(34,848,999)
Net book value - intangible assets to be amortized	¥ 1,639,904,372	843,680,858
Business Relationship \| Minimum
Intangible assets disclosures
Intangible asset useful life	5 years
Business Relationship \| Maximum
Intangible assets disclosures
Intangible asset useful life	10 years
Technology
Intangible assets disclosures
Intangible assets to be amortized	¥ 696,499,639	447,515,717
Less: accumulated amortization	(110,511,387)	(15,566,396)
Net book value - intangible assets to be amortized	¥ 585,988,252	431,949,321
Technology \| Minimum
Intangible assets disclosures
Intangible asset useful life	5 years
Technology \| Maximum
Intangible assets disclosures
Intangible asset useful life	6 years
Non-compete agreements
Intangible assets disclosures
Intangible assets to be amortized	¥ 11,479,610	11,479,610
Less: accumulated amortization	¥ (11,479,610)	(11,479,610)
Intangible asset useful life	5 years
Cross-border travel agency license
Intangible assets disclosures
Intangible assets to be amortized	¥ 1,117,277	1,117,277
Less: accumulated amortization	¥ (1,117,277)	(1,117,277)
Intangible asset useful life	8 years
Others
Intangible assets disclosures
Intangible assets to be amortized	¥ 17,990,000	17,990,000
Less: accumulated amortization	(6,684,666)	(5,036,667)
Net book value - intangible assets to be amortized	¥ 11,305,334	¥ 12,953,333

INTANGIBLE ASSETS - Amortization expense (Details) - CNY (¥)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
INTANGIBLE ASSETS
Amortization of intangible assets	¥ 255,000,000	¥ 58,000,000	¥ 5,000,000
Annual estimated amortization expense for intangible assets subject to amortization
2017	386,006,256
2018	385,701,422
2019	379,498,256
2020	362,549,757
2021	205,505,894
Total	¥ 1,719,261,585

SHORT-TERM DEBT AND CURRENT PORTION OF LONG-TERM DEBT (Details) € in Millions	1 Months Ended				12 Months Ended
	Dec. 31, 2015 USD ($) shares	Dec. 31, 2015 CNY (¥) shares	Oct. 31, 2015	Jun. 30, 2015 USD ($)	Dec. 31, 2016 EUR (€) item	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)
Short-term borrowings
Other short-term debt							¥ 48,157,745
Total						$ 991,978,912	6,887,309,589	¥ 12,710,213,398
Restricted cash						251,258,866	1,744,490,307	2,286,882,592
Short-term investment						2,032,674,966	14,112,862,288	8,235,785,516
Baidu
Short-term borrowings
Percentage of equity interest acquired			45.00%
2017 Convertible Senior Notes Due 2017
Short-term borrowings
Short-term bank borrowings	$ 50,000,000						171,000,000	325,000,000
Long-term debt, current maturities							170,867,230	324,796,892
2018 Convertible Senior Notes Due 2018
Short-term borrowings
Short-term bank borrowings	800,000,000							5,200,000,000
Long-term debt, current maturities								5,182,240,000
Qunar
Short-term borrowings
Long-term debt, current maturities								2,658,356,678
2% Interest rate convertible notes due 2021
Short-term borrowings
Change in shareholding in percent to trigger redemption				10.00%
Cash consideration for Make Whole Rate	$ 314,000,000	¥ 2,033,000,000
Conversion of Stock, Shares Converted \| shares	1,044,805	1,044,805
Aggregate consideration		¥ 4,500,000,000
2% Interest rate convertible notes due 2021 \| Qunar
Short-term borrowings
Interest rate (as a percent)				2.00%
Aggregate principal amount \| $				$ 500,000,000
Loan facility
Short-term borrowings
Short-term bank borrowings							6,668,284,614	¥ 4,544,819,828
Borrowing with an interest rate of 1.8%
Short-term borrowings
Short-term bank borrowings						$ 56,300,000	391,000,000
Number of borrowings \| item					1
Restricted cash							¥ 200,000,000
Interest rate (as a percent)					1.70%	1.70%	1.70%
Borrowing with an interest rate of 1.7%
Short-term borrowings
Short-term bank borrowings						$ 54,500,000	¥ 378,000,000
Number of borrowings \| item					1
Short-term investment							¥ 400,000,000
Interest rate (as a percent)					1.70%	1.70%	1.70%
Borrowing with an interest rate from 1.6% to 2.0%
Short-term borrowings
Short-term bank borrowings						$ 125,000,000	¥ 868,000,000
Number of borrowings \| item					3
Restricted cash							60,000,000
Borrowing with an interest rate of 1.43%
Short-term borrowings
Short-term bank borrowings						$ 152,000,000	1,100,000,000
Number of borrowings \| item					4
Short-term investment							¥ 580,000,000
Interest rate (as a percent)					1.40%	1.40%	1.40%
Borrowing with an interest rate from 3.9% to 5.1%
Short-term borrowings
Short-term bank borrowings						$ 36,000,000	¥ 250,000,000
Number of borrowings \| item					4
Restricted cash							250,000,000
Borrowing with an interest rate from 3.1% to 4.4%
Short-term borrowings
Short-term bank borrowings						$ 531,500,000	3,700,000,000
Number of borrowings \| item					20
Borrowing with an interest rate from 2.3% to 2.9%
Short-term borrowings
Short-term bank borrowings					€ 5		¥ 36,300,000
Number of borrowings \| item					5
Minimum \| Borrowing with an interest rate from 1.6% to 2.0%
Short-term borrowings
Interest rate (as a percent)					1.60%	1.60%	1.60%
Minimum \| Borrowing with an interest rate from 3.9% to 5.1%
Short-term borrowings
Interest rate (as a percent)					3.90%	3.90%	3.90%
Minimum \| Borrowing with an interest rate from 3.1% to 4.4%
Short-term borrowings
Interest rate (as a percent)					3.10%	3.10%	3.10%
Minimum \| Borrowing with an interest rate from 2.3% to 2.9%
Short-term borrowings
Interest rate (as a percent)					2.30%	2.30%	2.30%
Maximum \| Borrowing with an interest rate from 1.6% to 2.0%
Short-term borrowings
Interest rate (as a percent)					2.00%	2.00%	2.00%
Maximum \| Borrowing with an interest rate from 3.9% to 5.1%
Short-term borrowings
Interest rate (as a percent)					5.10%	5.10%	5.10%
Maximum \| Borrowing with an interest rate from 3.1% to 4.4%
Short-term borrowings
Interest rate (as a percent)					4.40%	4.40%	4.40%
Maximum \| Borrowing with an interest rate from 2.3% to 2.9%
Short-term borrowings
Interest rate (as a percent)					2.90%	2.90%	2.90%

RELATED PARTY TRANSACTIONS AND BALANCES (Details)									1 Months Ended	12 Months Ended
RELATED PARTY TRANSACTIONS AND BALANCES (Details)	Oct. 27, 2015 USD ($)	Oct. 27, 2015 CNY (¥)	Oct. 26, 2015 USD ($)	May 04, 2015 USD ($)	May 04, 2015 CNY (¥)	Mar. 12, 2015 USD ($)	Mar. 12, 2015 CNY (¥)	Feb. 27, 2014 USD ($)	Sep. 30, 2013 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)	Dec. 31, 2016 CNY (¥)	Oct. 26, 2015 CNY (¥)
RELATED PARTY TRANSACTIONS AND BALANCES
Repayment of entrusted loan and interest to related parties										$ 262,265,810	¥ 1,820,911,519
Due from related parties, current										113,438,569			¥ 961,791,458		¥ 787,603,986
Due from related parties, non-current										86,405,479			543,911,586		599,913,241
Due to related parties, current										$ 120,613,761			2,062,965,953		837,421,345
eLong
RELATED PARTY TRANSACTIONS AND BALANCES
Commissions from related parties											261,139,916		7,191,870
Commissions to related parties											85,780,819		9,532,316
Due from related parties, current													34,515,489		132,381,883
Due to related parties, current													165,436,171		506,461,015
Home Inns
RELATED PARTY TRANSACTIONS AND BALANCES
Commissions from related parties											66,921,837		34,556,539	¥ 38,139,325
Hanting
RELATED PARTY TRANSACTIONS AND BALANCES
Commissions from related parties											44,094,542		17,740,390	19,234,632
Online marketing service from related parties											13,000,000
Tujia
RELATED PARTY TRANSACTIONS AND BALANCES
Commissions from related parties											6,023,389		5,967,489
A technology company focusing on hotel customer reviews
RELATED PARTY TRANSACTIONS AND BALANCES
Loan and interest to related parties									¥ 13,000,000					694,577
Term of the loan									1 year
Baidu
RELATED PARTY TRANSACTIONS AND BALANCES
Loan and interest to related parties	$ 100,000,000	¥ 650,000,000
Repayment of entrusted loan and interest from related parties											652,299,803
Commissions to related parties											96,056,853
Online marketing service from related parties											110,064,311		89,244,042
Repayment of entrusted loan and interest to related parties											1,837,384,234
Term of the loan	12 months	12 months
Interest rate on loan (as a percent)	1.00%	1.00%
Due from related parties, current													788,860,421		408,834,667
Due to related parties, current													1,891,209,753		293,579,066
Outstanding entrusted loan and interest to related parties													651,000,000
Baidu \| Qunar
RELATED PARTY TRANSACTIONS AND BALANCES
Outstanding balance related to business cooperation agreement													138,000,000		409,000,000
Skyseas
RELATED PARTY TRANSACTIONS AND BALANCES
Loan and interest to related parties											73,399,675	$ 80,000,000	¥ 15,826,363	505,955,950
Interest rate on loan (as a percent)												3.00%	3.00%
Due from related parties, current													¥ 56,727,885		132,035,460
Due from related parties, non-current													543,911,586		599,913,241
LY.com
RELATED PARTY TRANSACTIONS AND BALANCES
Commissions to related parties											62,150,144		75,297,659	76,093,733
Due from related parties, current													33,051,263		96,308,665
Ananda Travel Service (Aust.) Pty Limited ("Ananda")
RELATED PARTY TRANSACTIONS AND BALANCES
Purchases from related party											¥ 12,714,298		11,351,388	¥ 27,197,283
Others
RELATED PARTY TRANSACTIONS AND BALANCES
Due from related parties, current													48,636,400		18,043,311
Due to related parties, current													¥ 6,320,029		¥ 37,381,264
Baidu Times \| Qunar
RELATED PARTY TRANSACTIONS AND BALANCES
Interest rate on loan (as a percent)			4.14%
Loan granted by related parties			$ 99,000,000													¥ 640,000,000
Debt instrument term			12 months
Revolving credit facility agreement \| Qunar
RELATED PARTY TRANSACTIONS AND BALANCES
Drawdowns during the period					¥ 627,000,000		¥ 507,000,000
Revolving credit facility agreement \| Baidu \| Qunar
RELATED PARTY TRANSACTIONS AND BALANCES
Drawdowns during the period				$ 97,000,000	¥ 627,000,000	$ 78,000,000	¥ 507,000,000
Maximum borrowing capacity \| $								$ 300,000,000
Debt instrument term								3 years
Commitment fee \| $								$ 0
Rate of benchmark lending rate								90.00%
Maximum \| Revolving credit facility agreement \| Baidu \| Qunar
RELATED PARTY TRANSACTIONS AND BALANCES
Duration for repayment of drawdown								3 years

EMPLOYEE BENEFITS (Details) - CNY (¥) ¥ in Millions	12 Months Ended
EMPLOYEE BENEFITS (Details) - CNY (¥) ¥ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
EMPLOYEE BENEFITS
Expense of employee benefits	¥ 1,400	¥ 961	¥ 725

TAXATION - Company's subsidiaries (Details) - CNY (¥)	12 Months Ended					36 Months Ended
TAXATION - Company's subsidiaries (Details) - CNY (¥)	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2016
Taxation
Applicable tax rate (as a percent)	25.00%	25.00%	25.00%
Deferred tax liability provided on the outside basis difference from undistributed earnings	¥ 0					¥ 0
Ctrip Computer Technology
Taxation
Applicable tax rate (as a percent)						15.00%
Ctrip Travel Network
Taxation
Applicable tax rate (as a percent)						15.00%
Ctrip Travel Information
Taxation
Applicable tax rate (as a percent)						15.00%
Hong Kong Profits Tax
Taxation
Applicable tax rate (as a percent)	16.50%
Taiwan Enterprise Income Tax
Taxation
Applicable tax rate (as a percent)	17.00%
PRC Corporate Income Tax
Taxation
Applicable tax rate (as a percent)	25.00%
PRC Corporate Income Tax \| Western region of China \| Chengdu Ctrip
Taxation
Applicable tax rate (as a percent)	15.00%	15.00%	15.00%
Applicable tax rate approved (as a percent)				15.00%	15.00%
PRC Corporate Income Tax \| Western region of China \| Chengdu Ctrip International
Taxation
Applicable tax rate (as a percent)	15.00%	15.00%	15.00%	15.00%	15.00%
PRC Corporate Income Tax \| Western region of China \| Chengdu Information
Taxation
Applicable tax rate (as a percent)	15.00%	15.00%	15.00%	15.00%	15.00%
PRC Corporate Income Tax \| High new tech enterprises \| Ctrip Computer Technology
Taxation
Applicable tax rate (as a percent)	15.00%
PRC Corporate Income Tax \| High new tech enterprises \| Ctrip Travel Network
Taxation
Applicable tax rate (as a percent)	15.00%
PRC Corporate Income Tax \| High new tech enterprises \| Qunar Software
Taxation
Applicable tax rate (as a percent)	15.00%
PRC Corporate Income Tax \| High new tech enterprises \| Qunar Beijing
Taxation
Applicable tax rate (as a percent)	15.00%
PRC Corporate Income Tax \| High new tech enterprises \| Jointwisdom
Taxation
Applicable tax rate (as a percent)	15.00%

TAXATION - Components of domestic and foreign income before income tax expenses (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)
Income/(loss) from domestic and foreign components before income tax expenses
Domestic		¥ 2,207,474,278	¥ 1,873,383,988	¥ 627,725,908
Foreign		(3,967,579,279)	1,131,979,994	(592,473,548)
Total	$ (253,507,851)	¥ (1,760,105,001)	¥ 3,005,363,982	¥ 35,252,360

TAXATION - Composition of income tax expense (Details)	12 Months Ended
TAXATION - Composition of income tax expense (Details)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)
TAXATION
Current income tax expense		¥ 454,533,605	¥ 383,723,730	¥ 228,395,153
Deferred tax (benefit)/expense	$ 3,381,164	23,475,428	86,464,693	(97,573,997)
Income tax expense	$ 68,847,621	¥ 478,009,033	¥ 470,188,423	¥ 130,821,156

TAXATION - Reconciliation of tax rate and components of deferred tax assets and liabilities (Details)	12 Months Ended				36 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)
Reconciliation of differences between statutory tax rate and effective tax rate
Statutory CIT rate (as a percent)	25.00%	25.00%	25.00%	25.00%
Tax differential from statutory rate applicable to subsidiaries with preferential tax rates (as a percent)	8.00%	8.00%	(5.00%)	(375.00%)
Gain on deconsolidation of a subsidiary with a withholding tax rate of 10% versus the statutory CIT rate			(11.00%)
Non-deductible expenses incurred (as a percent)	(50.00%)	(50.00%)	6.00%	480.00%
Change in valuation allowance (as a percent)	(10.00%)	(10.00%)	1.00%	241.00%
Effective CIT rate (as a percent)	(27.00%)	(27.00%)	16.00%	371.00%
Withholding tax rate (as a percent)	10.00%	10.00%	10.00%	10.00%
Share based compensation charge	$ 512,706,136	¥ 3,559,718,706	¥ 642,596,474	¥ 496,643,489
Increase in income tax due to share based compensation charge		¥ 890,000,000	¥ 161,000,000	¥ 124,000,000
Increase in income tax rate due to share based compensation charge	(51.00%)	(51.00%)	5.00%	352.00%
Deferred tax assets:
Valuation allowance for operating loss carry forwards		¥ 31,489,450	¥ 183,449,500	¥ 86,735,795	¥ 86,735,795	¥ 150,286,773	¥ 31,489,450
Deferred tax assets, non-current:
Accrued expenses						149,205,615	109,784,998
Loss carry forward						159,747,175	78,771,363
Accrued liability for customer reward related programs						122,635,196	114,965,397
Accrued staff salary						55,228,349	110,263,508
Others						38,782,032	23,038,753
Less: Valuation allowance of deferred tax assets						(150,286,773)	(31,489,450)
Total deferred tax assets, non-current						375,311,594	405,334,569
Deferred tax liabilities, non-current:
Recognition of intangible assets arise from business combinations						(3,607,882,808)	(3,045,259,390)
Net deferred tax liabilities						(3,232,571,214)	¥ (2,639,924,821)
Movement of valuation allowances
Balance at beginning of year		31,489,450	183,449,500	86,735,795	86,735,795
Current year additions		118,797,323	31,590,648	96,713,705
Deconsolidation of Tujia			(183,550,698)
Balance at end of year		¥ 150,286,773	¥ 31,489,450	¥ 183,449,500	¥ 150,286,773
Operating tax loss carry forwards						¥ 678,000,000
Subsidiaries
Reconciliation of differences between statutory tax rate and effective tax rate
Effective CIT rate (as a percent)	8.00%	8.00%	(5.30%)	(375.00%)
Ctrip Computer Technology
Reconciliation of differences between statutory tax rate and effective tax rate
Statutory CIT rate (as a percent)					15.00%
Effective CIT rate (as a percent)	4.00%	4.00%	(1.40%)	(74.00%)
Ctrip Travel Information
Reconciliation of differences between statutory tax rate and effective tax rate
Statutory CIT rate (as a percent)					15.00%
Effective CIT rate (as a percent)	2.00%	2.00%	(0.40%)	(48.00%)
Ctrip Travel Network
Reconciliation of differences between statutory tax rate and effective tax rate
Statutory CIT rate (as a percent)					15.00%
Effective CIT rate (as a percent)	7.00%	7.00%	(3.00%)	(154.00%)
Chengdu Ctrip Travel Agency Co., Ltd.
Reconciliation of differences between statutory tax rate and effective tax rate
Statutory CIT rate (as a percent)					15.00%
Effective CIT rate (as a percent)	1.00%	1.00%	(0.20%)	(11.00%)
Ctrip Hong Kong subsidiaries
Reconciliation of differences between statutory tax rate and effective tax rate
Statutory CIT rate (as a percent)					16.50%
Effective CIT rate (as a percent)	1.00%	1.00%	(0.30%)	(88.00%)
Qunar and subsidiaries
Reconciliation of differences between statutory tax rate and effective tax rate
Statutory CIT rate (as a percent)					15.00%
Effective CIT rate (as a percent)	(7.00%)	(7.00%)

TAXATION - Effect of preferential tax (Details) - CNY (¥)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income tax holiday
Tax holiday effect	¥ 177,799,057	¥ 162,896,542	¥ 85,036,934
ADS
Income tax holiday
Basic net income per ADS effect (in RMB per share)	¥ 0.38	¥ 1.08	¥ 0.62
Diluted net income per ADS effect (in RMB per share)	¥ 0.38	¥ 0.86	¥ 0.56

OTHER PAYABLES AND ACCRUALS (Details)	1 Months Ended
OTHER PAYABLES AND ACCRUALS (Details)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 CNY (¥)	Oct. 31, 2015 CNY (¥)	Jun. 30, 2015 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)
Accrued operating expenses		¥ 1,385,818,397				¥ 1,549,809,298
Deposits received from suppliers and packaged-tour users		373,423,895				460,648,199
Due to employees for stock option proceeds received on their behalf		88,083,814				250,831,976
Payable for acquisition		125,377,844				157,004,868
Deposit for special bonus program		92,206,022				168,404,481
Interest payable		84,604,548				103,016,365
Accruals for property and equipment		53,582,762				22,855,856
Deferred revenue		18,235,219				12,664,375
Advances received for a potential investment disposal						17,665,162
Payable for Qunar CB holders		1,233,185,395
Others		106,649,754				106,920,667
Total		3,561,167,650			$ 410,459,635	¥ 2,849,821,247
Qunar
Equity interest acquired (as a percent)			45.00%
Purchase consideration	$ 5,103,252,544	¥ 32,541,365,375	¥ 4,500,000,000
Qunar \| 2% Interest rate convertible notes due 2021
Minimum change in ownership providing holders of debt, right to convert (as a percent)				10.00%
Qunar \| 2% Interest rate convertible notes due 2021
Aggregate principal amount \| $				$ 500,000,000
Interest rate (as a percent)				2.00%

LONG-TERM DEBT (Details) $ / shares in Units, shares in Millions							12 Months Ended
	Sep. 19, 2016 USD ($) $ / shares	Jul. 18, 2015 USD ($) $ / shares	Jun. 18, 2015 USD ($) $ / shares shares	Oct. 17, 2013 USD ($) $ / shares	Sep. 24, 2012 USD ($) $ / shares shares	Sep. 24, 2012 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) item $ / shares shares	Dec. 31, 2016 CNY (¥) item shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2015 CNY (¥) shares	Dec. 31, 2014 CNY (¥)	Dec. 31, 2016 CNY (¥) shares	Sep. 12, 2016 USD ($) $ / shares	Dec. 10, 2015 USD ($) item $ / shares	May 26, 2015 USD ($) $ / shares	Aug. 07, 2014 USD ($) $ / shares
LONG-TERM DEBT
Long-term loan \| ¥												¥ 2,550,000,000
Less: Debt issuance costs \| ¥										¥ (107,121,740)		(184,276,447)
Total							$ 4,990,735,065			18,354,608,260		34,650,673,553
Fair value of long term notes							4,700,000,000					¥ 32,300,000,000
Amount of notes tendered							$ 24,017,523	¥ 166,753,664		118,973,720	¥ 400,610,842
Proceeds from sale of warrants \| ¥										¥ 523,404,000
ADS \| Priceline Group
LONG-TERM DEBT
Maximum percentage of outstanding ADSs to be held by lender							15.00%					15.00%
ADS \| Purchased Call Option \| Long
LONG-TERM DEBT
Share price agreed to be sold by the couterparty on exercise of Purchased call option \| $ / shares					$ 19.34	$ 19.34
Borrowings collateralized by stock at a wholly-owned subsidiary
LONG-TERM DEBT
Interest rate (as a percent)							4.40%					4.40%
Aggregate principal amount							$ 244,900,000					¥ 1,700,000,000
Number of borrowings \| item							12	12
Borrowings guaranteed by a wholly-owned subsidiary
LONG-TERM DEBT
Interest rate (as a percent)							4.30%					4.30%
Aggregate principal amount							$ 122,400,000					¥ 850,000,000
Number of borrowings \| item							6	6
2018 1.25% Convertible Senior Notes
LONG-TERM DEBT
Long-term loan \| ¥												¥ 5,554,400,000
Interest rate (as a percent)				1.25%			1.25%			1.25%		1.25%
Aggregate principal amount				$ 800,000,000
Debt issuance costs				$ 19,600,000
2018 1.25% Convertible Senior Notes \| ADS
LONG-TERM DEBT
Initial conversion rate				12.7568000
Initial conversion price (in dollars per share) \| $ / shares				$ 78.39
2020 1% Convertible Senior Notes
LONG-TERM DEBT
Long-term loan \| ¥										¥ 4,534,460,000		¥ 4,860,100,000
Interest rate (as a percent)							1.00%			1.00%		1.00%
2025 1.99% Convertible Senior Notes
LONG-TERM DEBT
Long-term loan \| ¥										¥ 2,591,120,000		¥ 2,777,200,000
Interest rate (as a percent)		1.99%					1.99%			1.99%		1.99%
Aggregate principal amount		$ 400,000,000
Debt issuance costs		$ 6,800,000
2025 1.99% Convertible Senior Notes \| ADS
LONG-TERM DEBT
Initial conversion rate		9.3555000
Initial conversion price (in dollars per share) \| $ / shares		$ 106.89
2022 1.25% Convertible Senior Notes
LONG-TERM DEBT
Long-term loan \| ¥												¥ 6,769,425,000
Interest rate (as a percent)							1.25%			1.25%		1.25%
Priceline 1% Convertible 2019 Notes
LONG-TERM DEBT
Long-term loan \| ¥										¥ 3,238,900,000		¥ 3,471,500,000
Interest rate (as a percent)							1.00%			1.00%		1.00%				1.00%
Aggregate principal amount																$ 500,000,000
Priceline 1% Convertible 2019 Notes \| ADS
LONG-TERM DEBT
Initial conversion price (in dollars per share) \| $ / shares																$ 81.36
Priceline 1% Convertible 2020 Notes
LONG-TERM DEBT
Long-term loan \| ¥										¥ 1,619,450,000		¥ 1,735,750,000
Interest rate (as a percent)			1.00%				1.00%			1.00%		1.00%			1.00%
Aggregate principal amount			$ 700,000,000												$ 250,000,000
Debt issuance costs			$ 11,300,000
Priceline 1% Convertible 2020 Notes \| ADS
LONG-TERM DEBT
Initial conversion rate			9.1942000
Initial conversion price (in dollars per share) \| $ / shares			$ 108.76												$ 104.27
Number of shares that can be purchased from warrants sold \| shares			6.4
Exercise price of warrants sold (in dollars per share) \| $ / shares			$ 135.02
Priceline 1% Convertible 2020 Notes \| ADS \| Sold Warrants
LONG-TERM DEBT
Proceeds from sale of warrants			$ 84,400,000
Priceline 2% Convertible 2025 Notes
LONG-TERM DEBT
Long-term loan \| ¥										¥ 3,238,900,000		¥ 3,471,500,000
Interest rate (as a percent)							2.00%			2.00%		2.00%
Priceline 1.25% Convertible 2022 Notes
LONG-TERM DEBT
Long-term loan \| ¥												¥ 173,575,000
Interest rate (as a percent)	1.25%						1.25%			1.25%		1.25%	1.25%
Aggregate principal amount	$ 975,000,000												$ 25,000,000
Debt issuance costs	$ 19,000,000
Priceline 1.25% Convertible 2022 Notes \| ADS
LONG-TERM DEBT
Initial conversion rate	15.2688000
Initial conversion price (in dollars per share) \| $ / shares	$ 65.49												$ 65.49
Hillhouse 2% Convertible 2025 Notes
LONG-TERM DEBT
Long-term loan \| ¥										¥ 3,238,900,000		¥ 3,471,500,000
Interest rate (as a percent)							2.00%			2.00%		2.00%
2017 convertible senior notes
LONG-TERM DEBT
Interest rate (as a percent)					0.50%	0.50%
Aggregate principal amount					$ 180,000,000	$ 180,000,000
Debt issuance costs					$ 5,400,000	$ 5,400,000
Amount of notes tendered							$ 25,500,000	¥ 167,000,000	$ 18,900,000
2017 convertible senior notes \| Minimum
LONG-TERM DEBT
Percentage of cash incentive							1.50%	1.50%
2017 convertible senior notes \| Maximum
LONG-TERM DEBT
Percentage of cash incentive							2.00%	2.00%
2017 convertible senior notes \| Purchased Call Option
LONG-TERM DEBT
Proceeds from early termination of 2012 Purchased call option							$ 11,600,000
2017 convertible senior notes \| ADS
LONG-TERM DEBT
Initial conversion rate					0.0517116
Initial conversion price (in dollars per share) \| $ / shares					$ 19.34	$ 19.34
Number of instruments \| shares							2.6	2.6	1.0	1.0
Initial conversion rate						51.7116%
2017 convertible senior notes \| ADS \| Purchased Call Option \| Long \| Maximum
LONG-TERM DEBT
Number of shares agreed to be sold by the counterparty on exercise of Purchased Call option \| shares						9.3	10.2	10.2
2017 convertible senior notes \| ADS \| Sold Warrants
LONG-TERM DEBT
Proceeds from sale of warrants						$ 26,600,000	$ 77,200,000
Number of shares that can be purchased from warrants sold \| shares					9.3	9.3
Exercise price of warrants sold (in dollars per share) \| $ / shares					$ 26.37	$ 26.37	$ 96.27
2017 convertible senior notes \| ADS \| Sold Warrants \| Maximum
LONG-TERM DEBT
Number of shares that can be purchased from warrants sold \| shares							10.2					10.2
Priceline and Hillhouse Notes
LONG-TERM DEBT
Interest rate (as a percent)														2.00%
Aggregate principal amount														$ 1,000,000,000
Number of affiliates \| item														2
Priceline and Hillhouse Notes \| ADS
LONG-TERM DEBT
Initial conversion price (in dollars per share) \| $ / shares														$ 68.46

CAPITAL AND TREASURY STOCK (Details)	1 Months Ended		12 Months Ended
CAPITAL AND TREASURY STOCK (Details)	Sep. 30, 2016 USD ($) $ / shares shares	Sep. 30, 2016 CNY (¥) shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2016 CNY (¥) shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2015 CNY (¥) shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2014 CNY (¥) shares	Dec. 31, 2016 CNY (¥) shares	Dec. 30, 2016 $ / shares
Treasure stock
Amount of convertible notes early converted			$ 24,017,523	¥ 166,753,664		¥ 118,973,720		¥ 400,610,842
Treasury stock delivered to the notes holders, per early conversion (in shares) \| shares			330,048	330,048	244,466	244,466	846,131	846,131
Treasury stock, shares \| shares			3,247,309			3,577,357			3,247,309
Treasury stock at cost			$ 321,989,703			¥ 2,372,927,372			¥ 2,235,574,510
Shared issued price per ADSs \| $ / shares										$ 320.00
2012 Convertible Senior Notes
Treasure stock
Amount of convertible notes early converted \| $			$ 21,600,000		$ 16,500,000		$ 61,600,000
ADS
Treasure stock
Issuance cost \| ¥		¥ 226,000,000
ADS \| Over allotment option
Treasure stock
Aggregate number of ADS shares \| shares	32,775,000	32,775,000
Additional number of shares \| shares	4,275,000	4,275,000
Shared issued price per ADSs \| $ / shares	$ 45.96
Aggregate amount of offering price \| $	$ 1,500,000,000
Baidu \| ADS
Treasure stock
Shared issued price per ADSs \| $ / shares			$ 45.96
Aggregate investment amount \| $			$ 100,000,000
Priceline Group \| ADS
Treasure stock
Shared issued price per ADSs \| $ / shares			$ 45.96
Aggregate investment amount \| $			$ 25,000,000

NON-CONTROLLING INTERESTS (Details)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 CNY (¥)	Dec. 31, 2015 CNY (¥)
NON-CONTROLLING INTERESTS
Non-controlling interests	$ 573,803,513	¥ 3,983,917,792	¥ 19,134,198,247
Qunar and subsidiaries
NON-CONTROLLING INTERESTS
Non-controlling interests		2,197,375,082	17,855,897,129
An offline travel agency
NON-CONTROLLING INTERESTS
Non-controlling interests		454,550,413	455,614,677
Skyscanner
NON-CONTROLLING INTERESTS
Non-controlling interests		315,836,071
Travelfusion
NON-CONTROLLING INTERESTS
Non-controlling interests		315,803,463	289,875,458
A technology company focusing on hotel customer reviews
NON-CONTROLLING INTERESTS
Non-controlling interests		285,110,984	262,762,132
An online trip package service provider
NON-CONTROLLING INTERESTS
Non-controlling interests		133,004,201	134,586,452
Others
NON-CONTROLLING INTERESTS
Non-controlling interests		¥ 282,237,578	¥ 135,462,399

EARNINGS/(LOSSES) PER SHARE (Details)	12 Months Ended
EARNINGS/(LOSSES) PER SHARE (Details)	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2016 CNY (¥) ¥ / shares shares	Dec. 31, 2015 CNY (¥) ¥ / shares shares	Dec. 31, 2014 CNY (¥) ¥ / shares shares
Numerator:
Net income/(loss) attributable to Ctrip's shareholders	$ (206,064,123)	¥ (1,430,703,195)	¥ 2,507,655,884	¥ 242,739,781
Eliminate the dilutive effect of interest expense of convertible notes \| ¥			185,589,773
Numerator for diluted earnings/(loss) per share \| ¥		¥ (1,430,703,195)	¥ 2,693,245,657	¥ 242,739,781
Denominator:
Denominator for basic earnings/(loss) per ordinary share - weighted average ordinary shares outstanding	59,166,582	59,166,582	37,797,698	34,289,170
Dilutive effect of share options			2,962,481	3,106,496
Dilutive effect of convertible notes			6,102,417
Dilutive effect of convertible notes sold warrants			512,652	812,192
Denominator for diluted earnings/(loss) per ordinary share	59,166,582	59,166,582	47,375,248	38,207,858
Number of outstanding weighted average ordinary shares excluded from the calculation of diluted earnings per common share	14,047,548	14,047,548	2,385,984	6,823,534
2017 convertible senior notes
Denominator:
Number of outstanding weighted average ordinary shares excluded from the calculation of diluted earnings per common share	435,248	435,248		1,587,142
2018 1.25% Convertible Senior Notes
Denominator:
Number of outstanding weighted average ordinary shares excluded from the calculation of diluted earnings per common share	2,551,360	2,551,360		2,551,346
2020 1% Convertible Senior Notes
Denominator:
Number of outstanding weighted average ordinary shares excluded from the calculation of diluted earnings per common share	1,608,985	1,608,985
2025 1.99% Convertible Senior Notes
Denominator:
Number of outstanding weighted average ordinary shares excluded from the calculation of diluted earnings per common share	935,550	935,550	486,999
2022 1.25% Convertible Senior Notes
Denominator:
Number of outstanding weighted average ordinary shares excluded from the calculation of diluted earnings per common share	559,282	559,282
Priceline 1% Convertible 2019 Notes
Denominator:
Number of outstanding weighted average ordinary shares excluded from the calculation of diluted earnings per common share	1,536,338	1,536,338		614,535
Priceline 1% Convertible 2020 Notes
Denominator:
Number of outstanding weighted average ordinary shares excluded from the calculation of diluted earnings per common share	599,400	599,400
Priceline 2% Convertible 2025 Notes
Denominator:
Number of outstanding weighted average ordinary shares excluded from the calculation of diluted earnings per common share	912,919	912,919	50,023
Priceline 1.25% Convertible 2022 Notes
Denominator:
Number of outstanding weighted average ordinary shares excluded from the calculation of diluted earnings per common share	14,341	14,341
A long-term equity investment firm notes
Denominator:
Number of outstanding weighted average ordinary shares excluded from the calculation of diluted earnings per common share	912,919	912,919	50,023
Stock options
Denominator:
Number of outstanding weighted average ordinary shares excluded from the calculation of diluted earnings per common share	3,678,030	3,678,030	64,074	74,104
Sold Warrants
Denominator:
Number of outstanding weighted average ordinary shares excluded from the calculation of diluted earnings per common share	303,176	303,176	1,734,865	1,996,407
Ordinary shares
Denominator:
Basic earnings/(loss) (in RMB per share) \| (per share)	$ (3.48)	¥ (24.18)	¥ 66.34	¥ 7.08
Diluted earnings/(loss) (in RMB per share) \| (per share)	(3.48)	(24.18)	56.85	6.35
ADS
Denominator:
Basic earnings/(loss) (in RMB per share) \| (per share)	(0.44)	(3.02)	8.29	0.88
Diluted earnings/(loss) (in RMB per share) \| (per share)	$ (0.44)	¥ (3.02)	¥ 7.11	¥ 0.79

COMMITMENTS AND CONTINGENCIES (Details) - CNY (¥)	12 Months Ended
COMMITMENTS AND CONTINGENCIES (Details) - CNY (¥)	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating lease commitments
2017	¥ 169,718,510
2018	51,750,674
2019	20,189,854
2020	6,169,875
2021	3,915,262
Thereafter	19,472,555
Total	271,216,730
Operating lease, rental expense
Rental expense	378,000,000	¥ 134,000,000	¥ 144,000,000
Capital commitments
Outstanding capital commitments	2,000,000
Guarantee
Guarantee arrangements	¥ 906,000,000