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Accounts receivable, net
 12 Months Ended
Dec. 31, 2018
Accounts Receivable, Net [Abstract]  
Accounts receivable, net
4.Accounts receivable, net

 

Accounts receivable, net is consisted of the following:

 

  December 31, 2017  December 31, 2018 
  RMB  RMB 
Accounts receivable, gross:  8,885   52,746 
Less: allowance for doubtful accounts  (418)  (491)
Accounts receivable, net  8,467   52,255 

 

The Group closely monitors the collection of its accounts receivable and records allowance for doubtful accounts against aged accounts receivable and for specifically identified non-recoverable amounts. If the economic situation and the financial condition of a customer deteriorate resulting in an impairment of the customer's ability to make payments, additional allowances might be required.

 

Receivable balance are written off when they are determined to be uncollectable. The following table sets out movements of the allowance for doubtful accounts for the years ended December 31, 2016, 2017 and 2018:

 

  December 31, 2016  December 31, 2017  December 31, 2018 
   RMB   RMB   RMB 
Balance at the beginning of the period  -   -   418 
Additions charged to bad debt expense  -   418   491 
Write-off of bad debt allowance  -   -   (418)
Balance at the end of the period  -   418   491