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INCOME TAXES (Schedule of Deferred Income Tax Assets) (Details) - CNY (¥) ¥ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Accounts receivable | ¥ 47,126 | ¥ 34,616 |  |
Tax loss carry forwards | 9,984 | 7,065 |  |
Advertising expense | 23,401 | 13,666 |  |
Accrued expenses and other current liabilities | 123 |  |  |
Total deferred income tax assets | 80,634 | 55,347 |  |
Valuation allowance | (26,507) | (20,115) | ¥ (14,362) | ¥ (3,647)
Deferred income tax assets, net | ¥ 54,127 | ¥ 35,232 |  |

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