Accounts Receivable, Net (Tables)

12 Months Ended

Dec. 31, 2012

Accounts Receivable, Net [Abstract]

Accounts Receivable, Net

The following table sets out the balance of accounts receivable as of December 31, 2011 and 2012:

	As of December 31,
	2011		2012		2012
	RMB		RMB		US$
Accounts receivable, gross	210,501		303,185		48,665
Allowance for doubtful accounts	(8,404	)	(22,198	)	(3,563	)
Accounts receivable, net	202,097		280,987		45,102

Allowance for doubtful accounts receivable

The following table presents movement of the allowance for doubtful accounts:

	2010	2011		2012		2012
	RMB	RMB		RMB		US$
Balance at the beginning of the period	1,398	2,447		8,404		1,349
Additional provision charged to bad debt expenses	1,049	11,926		25,902		4,158
Write-off of bad debt provision	—	(5,969	)	(12,108	)	(1,944	)
Balance at the end of the period	2,447	8,404		22,198		3,563