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BANK AND OTHER BORROWINGS (Narrative) (Details)
$ / shares in Units, ¥ in Thousands, $ in Thousands
 12 Months Ended
Feb. 18, 2014
USD ($)
$ / shares
Dec. 31, 2016
CNY (¥)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
CNY (¥)
Dec. 31, 2014
CNY (¥)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Jun. 30, 2015
USD ($)
Debt Instrument [Line Items]                
Property and equipment pledged as collateral   ¥ 111,728   ¥ 138,321   $ 16,092    
Accounts receivable used to secure bank borrowings   34,850   51,304   5,019    
Net investment in direct financing leases   86,250   209,905   12,422    
Restricted cash   ¥ 568,494   ¥ 555,035   $ 81,880    
Short-term bank borrowings, weighted average interest rate   2.72%   1.71%   2.72% 1.71%  
Proceeds received from long -term bank borrowing   ¥ 16,500 $ 2,376 ¥ 343,301 ¥ 291,892      
Loss on debt extinguishment   (36,648)      
International Finance Corporation [Member]                
Debt Instrument [Line Items]                
Debt instrument, repayment term   Remaining repaid on February 29, 2016 and May 31, 2016 in two equal installments. Remaining repaid on February 29, 2016 and May 31, 2016 in two equal installments.          
Debt instrument, conversion term   The loan gives IFC the right to convert the loan in whole or in part, at any time prior to the fifth anniversary of the date of the disbursement of the loan, into ADSs of the Company at the conversion price in effect at such time. The loan gives IFC the right to convert the loan in whole or in part, at any time prior to the fifth anniversary of the date of the disbursement of the loan, into ADSs of the Company at the conversion price in effect at such time.          
Conversion price per ADS | $ / shares $ 6.90              
Long -term bank borrowing $ 14,149              
Principal amount of loan 20,000              
Proceeds received from long -term bank borrowing 20,000              
Fair value of the bifurcated compound derivative $ 5,851     64,804        
Principal amount of loan             $ 10,000  
Loss on debt extinguishment | ¥   ¥ 36,648            
Line of Credit Entered into by Subsidiary [Member]                
Debt Instrument [Line Items]                
Net investment in direct financing leases   75,506   143,440   $ 10,875    
Short-term Bank Borrowings [Member]                
Debt Instrument [Line Items]                
Maximum borrowing capacity of credit line   ¥ 583,538   ¥ 939,508   $ 84,047    
Long-term Bank and Other Borrowings [Member]                
Debt Instrument [Line Items]                
Long-term bank and other borrowings, weighted average interest rate   7.44%   5.27%   7.44% 5.27%  
Maximum borrowing capacity of credit line   ¥ 277,136   ¥ 250,468   $ 39,916    
Short Term Bank Credit Lines [Member]                
Debt Instrument [Line Items]                
Unutilized bank credit lines   1,529,065       220,231    
Long-term loan agreement [Member] | Gopher [Member]                
Debt Instrument [Line Items]                
Long -term bank borrowing           24,856    
Principal amount of loan | ¥   172,575            
Principal amount of loan               $ 25,000
Interest rate (as a percent)               9.00%
Accrued interest   ¥ 5,894       $ 849