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TAXATION (Details) | 9 Months Ended | 12 Months Ended | 24 Months Ended | 120 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2015 CNY (¥) | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 item | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2014 | Dec. 31, 2010
Taxation |  |  |  |  |  |  |  |
Applicable tax rate (as a percent) | 25.00% | 25.00% | 25.00% | 25.00% | 25.00% |  |  |
Deferred tax liability provided on the outside basis difference from undistributed earnings | ¥ | ¥ 0 |  |  |  |  |  |  |
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% |  |  |  |  |  |  |
Withholding tax rate of FIT in Mainland China on dividends payable to company in Hong Kong | 5.00% |  |  |  |  |  |  |
PRC Corporate Income Tax | Western region of China |  |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  | 15.00% |  |  | 15.00%
PRC Corporate Income Tax | Western region of China | Chengdu Ctrip |  |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  | 15.00% | 15.00% |  |
Applicable tax rate approved (as a percent) |  |  |  |  |  |  | 15.00% |
PRC Corporate Income Tax | Western region of China | Chengdu Ctrip International |  |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  |  |  |  | 15.00% |  |  |
PRC Corporate Income Tax | Western region of China | Chengdu Information |  |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |  |
Applicable tax rate (as a percent) |  | 15.00% | 15.00% |  |  |  |  |
PRC Corporate Income Tax | High new tech enterprises |  |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |  |
Applicable tax rate (as a percent) | 15.00% |  |  |  |  |  |  |
Qualification effective period expired |  |  |  |  |  | 3 years |  |
Number of entities that reapplied for High New Tech Enterprises qualification and got approval | item |  |  |  | 4 |  |  |  |
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 Information |  |  |  |  |  |  |  |
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 | Software Hotel Information |  |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |  |
Applicable tax rate (as a percent) | 15.00% |  |  |  |  |  |  |
PRC Corporate Income Tax | Tax Period 2013 To 2016 | Western region of China | Chengdu Information |  |  |  |  |  |  |  |
Taxation |  |  |  |  |  |  |  |
Applicable tax rate approved (as a percent) | 15.00% |  |  |  |  |  |  |

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