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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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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings and other comprehensive loss (OCI).

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