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ASSET RETIREMENT OBLIGATIONS (Tables)
 12 Months Ended
Dec. 31, 2017
Disclosure of asset retirement obligations [Abstract]  
Schedule of Asset Retirement Obligations

The following table describes the changes to the Group's asset retirement obligation liability:

    Amount     Amount  
    CNY     US$  
                 
At January 1, 2016     4,967       763  
Accretion expenses     311       48  
Exchange adjustment     24       4  
At December 31, 2016     5,302       815  
Accretion expenses     60       9  
Disposal of subsidiaries (Note 3)     (5,338 )     (820 )
Exchange adjustment     (24 )     (4 )
At December 31, 2017     —       —