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Accounts receivable, net | 12 Months Ended
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Dec. 31, 2014
Accounts receivable, net |
Accounts receivable, net | 8. Accounts receivable, net Accounts receivable, net, consists of the following:
|  | As of December 31, |
|  | 2013 |  | 2014 |
|  | RMB |  | RMB |
Product sales and online marketplace receivables |  | 380,938 |  | 2,043,243 |
Online payment processing transactions receivables |  | 35,083 |  | 182,412 |
Advertising receivables |  | 44,372 |  | 62,705 |
Others |  | 43,466 |  | 219,567 |
Allowance for doubtful accounts |  |  |  |  |
Balance at beginning of the year |  | (1,877 | ) | (1,770 | )
Additions |  | (559 | ) | (72,608 | )
Reversals |  | 666 |  | 868 |
Write-offs |  | — |  | 1,839 |
Balance at end of the year |  | (1,770 | ) | (71,671 | )
Accounts receivable, net |  | 502,089 |  | 2,436,256 |
The value-added tax receivables from customers are recorded in product sales and online marketplace receivables.

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