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EQUITY METHOD INVESTMENTS (Narrative) (Details)
¥ in Thousands, $ in Thousands
1 Months Ended 12 Months Ended
Jul. 31, 2015
USD ($)
Jul. 31, 2015
CNY (¥)
Dec. 31, 2015
USD ($)
Dec. 31, 2015
CNY (¥)
Dec. 31, 2014
CNY (¥)
Dec. 31, 2013
CNY (¥)
Dec. 28, 2012
CNY (¥)
Jul. 31, 2015
CNY (¥)
Schedule Of Results Related To Equity Accounted Investees [Line Items]                
Share of net profit (loss)     $ (860) ¥ (5,572) ¥ 13,911 ¥ 13,470    
Cash distribution from an equity investee     3,754 24,316 21,984 ¥ 24,714    
Fair value of identified net asset on acquisition date $ 3,035           ¥ 73,570 ¥ 19,658
PTC [Member]                
Schedule Of Results Related To Equity Accounted Investees [Line Items]                
Share of net profit (loss) $ 5,280 ¥ 34,206         ¥ 107,139  
Cash distribution from an equity investee     $ 3,754 ¥ 24,316 ¥ 18,812