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OTHER NON-CURRENT ASSETS (Schedule of Other Non-Current Assets) (Parenthetical) (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2017
CNY (¥)
item
Dec. 31, 2017
USD ($)
item
Dec. 31, 2016
CNY (¥)
Jun. 21, 2011
CNY (¥)
Schedule Of Long Term Prepayment Deposits And Other Assets [Line Items]        
Deposits - long-term [1] ¥ 20,747 $ 3,189 ¥ 23,238  
Arrangement for Robotic Radio Surgery System [Member]        
Schedule Of Long Term Prepayment Deposits And Other Assets [Line Items]        
Deposits - long-term 11,527 1,772   ¥ 23,608
Security deposits non-current ¥ 10,252 $ 1,576    
Number of installments 9 9    
[1] On June 21, 2011, the Group provided interest-free financing amounting to RMB23,608 to Changhai Hospital, a third party, for the purchase of a robotic radiosurgery system. As at December 31, 2017, the outstanding balance was RMB11,527 (US$1,772), of which RMB10,252 (US$1,576) will be collected from 2019 to 2027 in 9 installments and thus classified as non-current. The balance also included deposit refundable each year for the secured borrowings amounting to RMB81,000 (US$12,449) (note 19).