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LONG-TERM INVESTMENTS (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
LONG-TERM INVESTMENTS.      
Equity investments without readily determinable fair values ¥ 51,524 $ 8,085 ¥ 45,085
Equity method investments 277,056 43,476 187,935
Available-for-sale debt securities 62,045 9,736 80,000
Total ¥ 390,625 $ 61,297 ¥ 313,020