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ACCOUNTS RECEIVABLE, NET (Tables) | 12 Months Ended
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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.

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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