Prepayments and other current assets consist of the following:


	As at December 31,
	2013			2014			2014
	RMB			RMB			US$
Prepayments to suppliers		1,141			317			51
Due from suppliers*		65,181			58,357			9,405
Advances to hospitals**		21,476			4,473			721
Advances to employees***		10,825			10,154			1,637
Deferred costs		6,200			—			—
Consideration receivable for disposal of CAH and WHT		—			80,453			12,967
Others		15,949			25,035			4,035

		120,772			178,789			28,816
Reserve for unrecoverable deposits		(9,292	)		(1,522	)		(245	)

		111,480			177,267			28,570


	For the Years Ended December 31,
	2013			2014			2014
	RMB			RMB			US$
Movement in reserve for unrecoverable deposits:
Balance at beginning of the year		10,270			9,292			1,498
Provisions for the year		1,533			1,324			213
Write off of provisions		(1,533	)		(9,524	)		(1,535	)
Foreign currency translation		(978	)		430			69

Balance at end of the year		9,292			1,522			245

Provisions are charged directly to the statement of comprehensive income. The related expense is included in the caption “general and administrative expenses” in the consolidated statements of comprehensive income.

Amounts due from suppliers represent returnable deposits of cancelled orders from suppliers. There were no remaining contractual obligations associated with purchase contracts as of December 31, 2013 and 2014, respectively. The risk of loss arising from non-performance by or bankruptcy of suppliers is assessed prior to the order of the equipment. The Group has provided reserve amounting to RMB9,292 and RMB1,522 (US$245) on amounts due from suppliers as at December 31, 2013 and 2014, respectively.

The amount represents interest-free advances to hospital customers. The Group has assessed the impact of such advances on revenue recognition at the outset of the arrangement and has concluded that they do not affect revenue recognition. The risk of loss arising from any failure by hospital customers to fulfill their financial obligations is assessed prior to making the advances and is monitored for recoverability on a regular basis by management. A charge to cost of revenue is recorded in the period in which a loss is incurred.

***

The amount represents interest-free advance to hospitals held by the Company’s employees to cover expenses incurred by hospital customers. The risk of loss is assessed prior to making the advances and is monitored on a regular basis by management. To date, the Group has not experienced any loss of such advances.