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Accounts and Notes Receivable, Net (Tables) | 12 Months Ended
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Dec. 31, 2017
Receivables [Abstract] |
Accounts and Notes Receivable and Allowance for Doubtful Debt | Accounts and notes receivable and the allowance for doubtful debt consist of the following:
|  | December 31, |
|  | 2016 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | US$ |
Accounts receivable |  |  | 735,154 |  |  |  | 526,747 |  |  |  | 80,960 |
Notes receivable |  |  | 1,215 |  |  |  | 2,720 |  |  |  | 418 |
Allowance for doubtful debt |  |  | (80,910 | ) |  |  | (73,656 | ) |  |  | (11,321 | )
|  |  | 655,459 |  |  |  | 455,811 |  |  |  | 70,057 |
Analysis of Allowance for Doubtful Debt | An analysis of the allowance for doubtful debt is as follows:
|  | December 31, |
|  | 2016 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | US$ |
Balance at beginning of the year |  |  | 40,070 |  |  |  | 80,910 |  |  |  | 12,436 |
Additional provision charged to expense |  |  | 79,637 |  |  |  | 69,553 |  |  |  | 10,690 |
Write-off of accounts receivable |  |  | (38,797 | ) |  |  | (19,766 | ) |  |  | (3,038 | )
Provision included in disposed subsidiaries |  |  | — |  |  |  | (57,041 | ) |  |  | (8,767 | )
Balance at the end of the year |  |  | 80,910 |  |  |  | 73,656 |  |  |  | 11,321 |

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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://www.xbrl.org/2003/role/presentationRef -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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- Definition Tabular disclosure of credit losses for current financing receivables (such as trade and accounts receivable), including a rollforward of the balance. An alternative caption includes allowance for doubtful accounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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