RELATED PARTY TRANSACTIONS (Narrative) (Details)
 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2013
CNY
Dec. 31, 2012
CNY
Dec. 31, 2011
CNY
Sep. 30, 2012
Expedia (refer to a1) [Member]
USD ($)
Sep. 30, 2012
Expedia (refer to a1) [Member]
CNY
Dec. 31, 2013
Expedia (refer to a1) [Member]
CNY
Dec. 31, 2012
Expedia (refer to a1) [Member]
CNY
Dec. 31, 2011
Expedia (refer to a1) [Member]
CNY
Dec. 31, 2013
Egencia Shanghai (refer to a2) [Member]
USD ($)
Dec. 31, 2013
Egencia Shanghai (refer to a2) [Member]
CNY
Dec. 31, 2013
Egencia Shanghai (refer to a2) [Member]
CNY
Dec. 31, 2012
Egencia Shanghai (refer to a2) [Member]
CNY
Dec. 31, 2011
Egencia Shanghai (refer to a2) [Member]
CNY
Dec. 31, 2013
Egencia Shanghai (refer to a2) [Member]
CNY
Dec. 31, 2012
Egencia Shanghai (refer to a2) [Member]
CNY
Dec. 31, 2011
Egencia Shanghai (refer to a2) [Member]
CNY
Dec. 31, 2013
Egencia Cayman (refer to a2) [Member]
CNY
Dec. 31, 2012
Egencia Cayman (refer to a2) [Member]
CNY
Dec. 31, 2013
Hotels.com (refer to a3) [Member]
CNY
Dec. 31, 2012
Hotels.com (refer to a3) [Member]
CNY
Dec. 31, 2011
Hotels.com (refer to a3) [Member]
CNY
Dec. 31, 2013
EAN (refer to a4) [Member]
CNY
Dec. 31, 2012
EAN (refer to a4) [Member]
CNY
Dec. 31, 2011
EAN (refer to a4) [Member]
CNY
Dec. 31, 2013
Expedia (refer to a5) [Member]
CNY
Dec. 31, 2012
Expedia (refer to a5) [Member]
CNY
Dec. 31, 2011
Expedia (refer to a5) [Member]
CNY
Dec. 31, 2013
TripAdvisor China (refer to b2) [Member]
CNY
Dec. 31, 2012
TripAdvisor China (refer to b2) [Member]
CNY
Dec. 31, 2011
TripAdvisor China (refer to b2) [Member]
CNY
Dec. 31, 2013
Kuxun (refer to b4) [Member]
CNY
Dec. 31, 2012
Kuxun (refer to b4) [Member]
CNY
Dec. 31, 2011
Kuxun (refer to b4) [Member]
CNY
Dec. 31, 2013
Tencent (refer to c1) [Member]
CNY
Dec. 31, 2012
Tencent (refer to c1) [Member]
CNY
Dec. 31, 2011
Tencent (refer to c1) [Member]
CNY
Jul. 31, 2011
Tencent (refer to c2) [Member]
CNY
Dec. 31, 2013
Tencent (refer to c2) [Member]
CNY
Dec. 31, 2012
Tencent (refer to c2) [Member]
CNY
Dec. 31, 2011
Tencent (refer to c2) [Member]
CNY
Dec. 31, 2013
Tencent (refer to c3) [Member]
CNY
Dec. 31, 2012
Tencent (refer to c3) [Member]
CNY
Dec. 31, 2011
Tencent (refer to c3) [Member]
CNY
Dec. 31, 2013
Expedia (refer to d2) [Member]
CNY
Dec. 31, 2012
Expedia (refer to d2) [Member]
CNY
Dec. 31, 2011
Expedia (refer to d2) [Member]
CNY
Dec. 31, 2013
Jiuyou (refer to e) [Member]
CNY
Dec. 31, 2012
Jiuyou (refer to e) [Member]
CNY
Dec. 31, 2011
Jiuyou (refer to e) [Member]
CNY
Dec. 31, 2013
2012 Affiliate Company (refer to f) [Member]
CNY
Dec. 31, 2012
2012 Affiliate Company (refer to f) [Member]
CNY
Dec. 31, 2011
2012 Affiliate Company (refer to f) [Member]
CNY
Dec. 31, 2013
2012 Second Affiliate Company (refer to g) [Member]
CNY
Dec. 31, 2012
2012 Second Affiliate Company (refer to g) [Member]
CNY
Dec. 31, 2011
2012 Second Affiliate Company (refer to g) [Member]
CNY
Dec. 14, 2012
2012 Second Affiliate Company (refer to g) [Member]
Nov. 15, 2012
2012 Second Affiliate Company (refer to g) [Member]
Related Party Transaction [Line Items]                                                                                                                  
Payments from related party       $ 7,000,000 44,414,300       $ 3,000,000 18,290,700                                                                                              
Payments to related party                                                                         5,000,000                                        
Commission, advertising and other expenses 89,329,551 66,713,487 40,415,004                                 159,839 314,866 228,579             5,335,431 3,422,325 5,901,772 9,332,505 5,175,662 5,812,043 40,744 84,196 29,547   5,241,110 9,167,909 1,783,766 282,089 340,625    1,074,780 1,308,182 728,588 63,171,034 45,188,643 26,659,297 5,216,413 2,650,942             
Commission, advertising and other revenues 92,518,130 32,870,516 14,983,962     14,804,767 3,701,192        36,153 44,358 47,154 417,382 198,631 97,378        5,326,181 3,648,431 81,659,483 26,127,688 10,112,820 1,185,101 394,003 407,474       94,745 339,669 650,020                     583,677 1,170,434 640,349             9,032,926 263,328       
Amount due from related parties 66,143,414 23,638,777               18,983,877 18,983,877 5,215,706                    6,913,654 4,040,987   97,319 236,001            185,375   20,327,198 8,024,273     5,000,000 5,000,000   300,000 300,000   865,678 374,575   13,547,426            100,000         
Amounts due to related parties 97,010,163 89,634,516       25,908,342 40,713,108     769,636 769,636 710,919   532,450      18,290,700          31,950,021 33,952,245   55,959 221,852   335,337 201,337   288,905 631,545           417,602 1,219,482   329,349 340,625            5,602,708   311,025 311,025   17,768,819 5,398,068      
Prepaid expenses to related parties                                                 727,710 414,919 1,871,169                                                            
Prepaid expenses from related parties                                                 893,603 202,531 2,220,193                                                            
Ownership percentage                                                                                                         35.00%     14.00% 21.00%