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ACCOUNTS RECEIVABLE (Narrative) (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2017
CNY (¥)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
CNY (¥)
Accounts receivable used to secure bank borrowings ¥ 13,164 $ 2,023 ¥ 34,850
Secured debt ¥ 20,100 $ 3,089 ¥ 45,400