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ACCOUNTS RECEIVABLE - Schedule of Accounts Receivable (Details)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2022
USD ($)
ACCOUNTS RECEIVABLE          
Accounts receivable ¥ 138,035   ¥ 132,831   $ 20,014
Allowance for credit losses (7,764)   (4,932)   (1,126)
Accounts receivable, net 130,271   127,899   $ 18,888
The rollforward in the allowance for credit losses were as follows:          
Balance at the beginning of the year 4,932 $ 715 6,473 ¥ 7,147  
Cumulative effect of adopting ASU 2016-13       597  
Disposal of subsidiary       (60)  
Provisions for the year 2,832 411 1,463 1,879  
Reversal of provisions from prior periods due to subsequent cash collection during the year     (983) (1,415)  
Amounts written off during the year     (2,021) (1,675)  
Balance at the end of the year ¥ 7,764 $ 1,126 ¥ 4,932 ¥ 6,473