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INCOME TAXES (Schedule of Income before Income Taxes) (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Taxes [Line Items] |  |  |
Income before income taxes | ¥ 260,630 | ¥ 182,727 | ¥ 166,645
PRC [Member] |  |  |
Income Taxes [Line Items] |  |  |
Income before income taxes | 272,745 | 200,789 | 146,570
Hong Kong [Member] |  |  |
Income Taxes [Line Items] |  |  |
Income before income taxes | (573) | (1,908) | (1,964)
Cayman Islands [Member] |  |  |
Income Taxes [Line Items] |  |  |
Income before income taxes | ¥ (11,542) | ¥ (16,154) | ¥ 22,039

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