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DEPOSITS FOR NON-CURRENT ASSETS
 12 Months Ended
Dec. 31, 2018
DEPOSITS FOR NON-CURRENT ASSETS [Abstract]  
DEPOSITS FOR NON-CURRENT ASSETS
13.
DEPOSITS FOR NON-CURRENT ASSETS
 
Deposits for non-current assets consist of the following:
 
 
 
As at December 31,
 
 
 
2017
 
 
2018
 
 
2018
 
 
 
RMB
 
 
RMB
 
 
US$
 
Deposits for purchases of property, plant and equipment*
 
 
297,040
 
 
 
668,698
 
 
 
97,258
 
Reserve for unrecoverable deposits
 
 
(30,860
)
 
 
(30,860
)
 
 
(4,488
)
 
 
 
266,180
 
 
 
637,838
 
 
 
92,770
 
  
 
*
The amount represented interest-free non-refundable partial payments to suppliers of medical equipment. The remaining contractual obligations associated with these purchase contracts are approximately
RMB
426,293
and RMB6
60,758
(US$
96,103
) as at December 31, 2017 and 2018 respectively, which are included in the amount disclosed as purchase commitments in note 26.
 
As at December31, 2017 and 2018, certain of the Group's deposits for non-current asset with a total net book value of nil and RMB13,800(US$2,007) were pledged for bank borrowings of nil and RMB10,731(US$1,561), respectively (note17).