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OTHER NON-CURRENT ASSETS (Tables)
12 Months Ended
Dec. 31, 2018
Other Assets, Noncurrent Disclosure [Abstract]  
Schedule of Other Non-Current Assets
 
 
 
As at December 31,
 
 
 
2017
 
 
2018
 
 
2018
 
 
 
RMB
 
 
RMB
 
 
US$
 
Deferred costs
 
 
1,066
 
 
 
267
 
 
 
39
 
Deposits – long-term*
 
 
20,747
 
 
 
2,719
 
 
 
395
 
Others**
 
 
8,579
 
 
 
4,890
 
 
 
709
 
 
 
 
30,392
 
 
 
7,876
 
 
 
1,143
 
 
* 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 RMB
11,527
was provided for the remaining balances as of December 31, 2018.
 
** For the years ended December 31, 2017 and 2018, no impairment loss were provided for the balances.