13.	COMMITMENTS AND CONTINGENCIES

Operating lease commitments

The Group leases office space and employee accommodation in the PRC under non-cancellable operating leases expiring on various dates. Payments under operating leases are expensed on a straight-line basis, after considering rent holidays, over the periods of the respective lease terms. The terms of the leases do not contain rent escalation or contingent rents, and for the years ended December 31, 2015, 2016 and 2017, total rental expenses for all operating leases amounted to RMB49,892, RMB84,673 and RMB95,654 (US$14,702) respectively.

As of December 31, 2017, the Group has future minimum lease payments under non-cancellable operating leases, with initial terms in excess of one year, for office premises consisting of the following:

 

		RMB				US$
2018			82,360				12,659
2019			48,982				7,528
2020 and thereafter			—				—
			131,342				20,187

Legal proceedings

From time to time, the Group is subject to legal proceedings and claims in the ordinary course of business. The Group does not believe that any currently pending legal proceeding to which the Group is a party will have a material effect on its business, balance sheets, and results of operations or cash flows.