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ACCOUNTS RECEIVABLE (Narrative) (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
ACCOUNTS RECEIVABLE      
Accounts receivable used to secure bank borrowings ¥ 10,056 $ 1,578 ¥ 33,686