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TAXATION - Reconciliation of tax rate and components of deferred tax assets and liabilities (Details) - CNY (¥) | 12 Months Ended | 36 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016
Reconciliation of the differences between statutory tax rate and effective tax rate |  |  |  |  |  |
Statutory CIT rate (as a percent) | 25.00% | 25.00% | 25.00% |  |  |
Tax differential from statutory rate applicable to subsidiaries with preferential tax rates (as a percent) | 6.00% | 8.00% | (5.00%) |  |  |
Gain on deconsolidation of a subsidiary with a withholding tax rate of 10% versus the statutory CIT rate |  |  | (11.00%) |  |  |
Non-deductible expenses and non-taxable income incurred | 4.00% | (50.00%) | 6.00% |  |  |
Change in valuation allowance (as a percent) | 2.00% | (10.00%) | 1.00% |  |  |
Effective CIT rate (as a percent) | 37.00% | (27.00%) | 16.00% |  |  |
Withholding tax rate (as a percent) | 10.00% | 10.00% | 10.00% |  |  |
Increase in income tax due to share based compensation charge | ¥ 458,000,000 | ¥ 890,000,000 | ¥ 161,000,000 |  |  |
Increase in income tax rate due to share based compensation charge | 13.00% | (51.00%) | 5.00% |  |  |
Deferred tax assets: |  |  |  |  |  |
Accrued expenses |  |  |  |  | ¥ 331,524,551 | ¥ 149,205,615
Loss carry forward |  |  |  |  | 150,575,892 | 159,747,175
Accrued liability for customer reward related programs |  |  |  |  | 99,188,976 | 122,635,196
Accrued staff salary |  |  |  |  | 4,018,972 | 55,228,349
Others |  |  |  |  | 73,875,163 | 38,782,032
Less: valuation allowance of deferred tax assets | ¥ 150,286,773 | ¥ 31,489,450 | ¥ 183,449,500 | ¥ 183,449,500 | 197,214,279 | 150,286,773
Total deferred tax assets |  |  |  |  | 461,969,275 | 375,311,594
Deferred tax liabilities |  |  |  |  |  |
Recognition of intangible assets arise from business combinations and unrealized holding gain |  |  |  |  | (3,847,440,251) | (3,607,882,808)
Net deferred tax assets/(liabilities) |  |  |  |  | (3,385,470,976) | (3,232,571,214)
Movement of valuation allowances |  |  |  |  |  |
Balance at beginning of year | 150,286,773 | 31,489,450 | 183,449,500 | 183,449,500 |  |
Current year additions | 46,927,506 | 118,797,323 | 31,590,648 |  |  |
Deconsolidation of Tujia |  |  | (183,550,698) |  |  |
Balance at end of year | ¥ 197,214,279 | ¥ 150,286,773 | ¥ 31,489,450 | ¥ 197,214,279 |  |
Operating tax loss carry forwards |  |  |  |  | 662,000,000 |
Unrecognized tax benefit and accrual |  |  |  |  | ¥ 0 | ¥ 0
Subsidiaries |  |  |  |  |  |
Reconciliation of the differences between statutory tax rate and effective tax rate |  |  |  |  |  |
Effective CIT rate (as a percent) | 6.40% | 8.20% | (5.30%) |  |  |
Ctrip Computer Technology |  |  |  |  |  |
Reconciliation of the differences between statutory tax rate and effective tax rate |  |  |  |  |  |
Statutory CIT rate (as a percent) |  |  |  | 15.00% |  |
Effective CIT rate (as a percent) | (1.60%) | 4.20% | (1.40%) |  |  |
Ctrip Travel Information |  |  |  |  |  |
Reconciliation of the differences between statutory tax rate and effective tax rate |  |  |  |  |  |
Statutory CIT rate (as a percent) |  |  |  | 15.00% |  |
Effective CIT rate (as a percent) | (1.60%) | 1.90% | (0.40%) |  |  |
Ctrip Travel Network |  |  |  |  |  |
Reconciliation of the differences between statutory tax rate and effective tax rate |  |  |  |  |  |
Statutory CIT rate (as a percent) |  |  |  | 15.00% |  |
Effective CIT rate (as a percent) | (1.60%) | 7.40% | (3.00%) |  |  |
Chengdu Information Technology Co., Ltd. |  |  |  |  |  |
Reconciliation of the differences between statutory tax rate and effective tax rate |  |  |  |  |  |
Statutory CIT rate (as a percent) |  |  |  | 15.00% |  |
Effective CIT rate (as a percent) | (2.10%) | 1.40% | (0.60%) |  |  |
The Company and its subsidiaries in Hong Kong and Cayman |  |  |  |  |  |
Reconciliation of the differences between statutory tax rate and effective tax rate |  |  |  |  |  |
Statutory CIT rate (as a percent) |  |  |  | 16.50% |  |
Statutory CIT rate alternate case (as a percent) |  |  |  | 0.00% |  |
Effective CIT rate (as a percent) | 15.40% | 0.80% | (0.30%) |  |  |
Qunar and subsidiaries |  |  |  |  |  |
Reconciliation of the 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%) | (5.90%) |  |  |  |
Other subsidiaries |  |  |  |  |  |
Reconciliation of the differences between statutory tax rate and effective tax rate |  |  |  |  |  |
Statutory CIT rate (as a percent) |  |  |  | 16.50% |  |
Statutory CIT rate alternate case (as a percent) |  |  |  | 15.00% |  |
Statutory CIT rate alternate case (as a percent) |  |  |  | 0.00% |  |
Effective CIT rate (as a percent) | (1.10%) | (1.60%) | 0.40% |  |  |

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