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ACCOUNTS RECEIVABLE, NET (Tables)
 12 Months Ended
Dec. 31, 2018
Receivables [Abstract]  
Schedule of Accounts Receivable
Accounts receivable consisted of the following:
 
 
 
As of December 31,
 
 
 
2017
 
 
2018
 
 
 
RMB
 
 
RMB
 
 
 
 
 
 
 
 
Accounts receivable
 
 
25,257
 
 
 
21,667
 
Less: Allowance for doubtful accounts
 
 
(746
)
 
 
(3,535
)
Accounts receivable, net
 
 
24,511
 
 
 
18,132
 
 
Allowance for doubtful accounts:
 
 
 
As of December 31,
 
 
 
2017
 
 
2018
 
 
 
RMB
 
 
RMB
 
 
 
 
 
 
 
 
Balance at beginning of year
 
 
-
 
 
 
(746
)
Addition (Note i)
 
 
(746
)
 
 
(4,616
)
Written off (Note i)
 
 
-
 
 
 
1,827
 
Balance at end of year
 
 
(746
)
 
 
(3,535
)
 
(Note i) Full provision was provided to receivables due from different customers due to the remote collectability, and certain provision was written off after all collection efforts have been exhausted and the potential for recovery was remote.