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SEGMENT REPORTING (Schdeule of Net Revenue by Country based upon Sales Location that Predominately represents Customer Location) (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2017
CNY (¥)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
CNY (¥)
Dec. 31, 2015
CNY (¥)
Segment reporting [Line Items]        
Net Revenues ¥ 330,977 $ 50,870 ¥ 455,042 ¥ 616,485
PRC [Member]        
Segment reporting [Line Items]        
Net Revenues 302,304 46,463 443,601 597,746
Singapore [Member]        
Segment reporting [Line Items]        
Net Revenues ¥ 28,673 $ 4,407 ¥ 11,441