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TAXATION (Schedule of Reconciliation of Beginning and Ending Amount of Liabilities Associated with Uncertain Tax Positions) (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Reconciliation of the beginning and ending amount of liabilities associated with uncertain tax positions |  |  |
Unrecognized tax benefits, beginning of year | ¥ 24,619 | ¥ 25,323 | ¥ 23,648
Increases related to current tax positions | 2,042 | 5,941 | 1,675
Decrease due to disposal of subsidiaries (Note 25) | 0 | (6,645) | 0
Decrease due to deregistration of subsidiary | (415) | 0 | 0
Unrecognized tax benefits, end of year | ¥ 26,246 | ¥ 24,619 | ¥ 25,323

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