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SHORT-TERM INVESTMENTS (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥)
Short-term investments |  |  |  |
Short-term investments |  |  | ¥ 252,805 |
Change in fair value of available-for-sale investments | $ 1,054 | ¥ 7,335 | 8,734 | ¥ 5,181
Realized gains transferred from other comprehensive income to other income (loss) |  | 9,635 | 10,869 | 1,154
Impairment charges |  | ¥ 0 | 0 | ¥ 0
Wealth Management Products |  |  |  |
Short-term investments |  |  |  |
Short-term investments |  |  | ¥ 252,805 |

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