EQUITY METHOD INVESTMENTS (Summarized Financial Information) (Details)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2017
CNY (¥)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
CNY (¥)
Dec. 31, 2015
CNY (¥)
Dec. 31, 2017
USD ($)
Schedule of Equity Method Investments [Line Items]          
Current assets ¥ 1,111,136   ¥ 1,194,856   $ 170,779
Non-current assets 2,354,254   2,033,747   361,843
Current liabilities 1,108,171   951,059   170,321
Non-current liabilities 1,342,301   1,045,774   206,311
Noncontrolling interests 80,869   65,592   12,429
Total revenues 330,977 $ 50,870 455,042 ¥ 616,485  
Gross profit 97,998 15,063 168,499 263,149  
Net income (285,684)   (265,084) (79,279)  
Net income (loss) attributable to the investees (284,320) (43,699) (261,867) (78,304)  
Guofu Huimei [Member]          
Schedule of Equity Method Investments [Line Items]          
Current assets 1,201,344   0   184,643
Non-current assets 930,412   0   143,002
Current liabilities 1,170,841   0   179,955
Non-current liabilities 0   0   0
Noncontrolling interests 0   0   0
Total revenues 0 0 0 0  
Gross profit 0 0 0 0  
Net income 53,261 8,186 0 0  
Net income (loss) attributable to the investees 13,896 2,136 0 0  
All Equity Investees [Member]          
Schedule of Equity Method Investments [Line Items]          
Current assets 1,490,408   139,963   229,072
Non-current assets 2,184,471   379,408   335,747
Current liabilities 1,382,880   171,317   212,545
Non-current liabilities 561,201   550,344   $ 86,255
Total revenues 277,192 42,604 247,327 286,021  
Gross profit 63,998 9,836 56,074 101,820  
Net income 14,631 2,249 18,379 58,373  
Net income (loss) attributable to the investees ¥ 1,454 $ 223 ¥ 616 ¥ (5,572)