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OTHER NON-CURRENT ASSETS (Schedule of Other Non-Current Assets) (Parenthetical) (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2018
CNY (¥)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
CNY (¥)
Jun. 21, 2011
CNY (¥)
Schedule Of Long Term Prepayment Deposits And Other Assets [Line Items]        
Deposits - long-term [1] ¥ 2,719 $ 395 ¥ 20,747  
Arrangement for Robotic Radio Surgery System [Member]        
Schedule Of Long Term Prepayment Deposits And Other Assets [Line Items]        
Deposits - long-term       ¥ 23,608
[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, impairment losses of RMB11,527 was provided for the remaining balances as of December 31, 2018.