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INVENTORIES (Schedule of Inventories) (Details)
¥ in Thousands
Dec. 31, 2017
USD ($)
Dec. 31, 2017
CNY (¥)
Dec. 31, 2016
CNY (¥)
ForeignCurrencyLineItems [Line Items]      
Materials and supplies | ¥   ¥ 8,437
Finished goods | ¥   2,120
Inventories | ¥   ¥ 10,557
USD [Member]      
ForeignCurrencyLineItems [Line Items]      
Materials and supplies | $    
Finished goods | $    
Inventories | $