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Accounts Receivable, Net (Tables) | 12 Months Ended
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Dec. 31, 2019
Accounts Receivable Net [Abstract] |
Balance of accounts receivable | The following table sets out the balance of accounts receivable as of December 31, 2018 and 2019 (in thousands):
|  | As of December 31, |
|  | 2018 |  |  | 2019 |  |  | 2019 |
|  | RMB |  |  | RMB |  |  | US$ |
Accounts receivable, gross |  |  | 562,797 |  |  |  | 757,158 |  |  |  | 108,759 |
Allowance for doubtful accounts |  |  | (78,684 | ) |  |  | (118,886 | ) |  |  | (17,077 | )
Accounts receivable, net |  |  | 484,113 |  |  |  | 638,272 |  |  |  | 91,682 |
Movement of the allowance for doubtful accounts | The following table presents the movement of the allowance for doubtful accounts (in thousands):
|  | 2017 |  |  | 2018 |  |  | 2019 |  |  | 2019 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
Balance as of January 1, |  |  | 91,348 |  |  |  | 65,454 |  |  |  | 78,684 |  |  |  | 11,302 |
Additional provision/(reversal) charged to bad debt expenses, net |  |  | (9,137 | ) |  |  | 22,473 |  |  |  | 43,932 |  |  |  | 6,311 |
Write-off of bad debt provision |  |  | (16,757 | ) |  |  | (9,243 | ) |  |  | (3,730 | ) |  |  | (536 | )
Balance as of December 31, |  |  | 65,454 |  |  |  | 78,684 |  |  |  | 118,886 |  |  |  | 17,077 |

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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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