ACCOUNTS RECEIVABLE (Tables)

12 Months Ended

Dec. 31, 2017

ACCOUNTS RECEIVABLE

Schedule of accounts receivable

	2016		2017
	RMB		RMB
Accounts receivable	117,390		192,245
Less: Allowance for doubtful accounts	(6,144	)	(5,384	)
	111,246		186,861

Schedule of movement of allowance for doubtful accounts

	2015		2016		2017
	RMB		RMB		RMB
Balance at beginning of period	1,103		3,290		6,144
Additions	3,792		6,705		5,738
Write-offs	(1,605	)	(3,851	)	(6,498	)
Balance at end of period	3,290		6,144		5,384