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ACCOUNTS RECEIVABLE (Narrative) (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2018
CNY (¥)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
CNY (¥)
Accounts receivable used to secure bank borrowings ¥ 0 $ 0 ¥ 13,164
Secured debt ¥ 0 $ 0 ¥ 20,100