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ACCOUNTS RECEIVABLE | 12 Months Ended
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Dec. 31, 2011
ACCOUNTS RECEIVABLE |
| 8. | ACCOUNTS RECEIVABLE
|  | As at December 31, |
|  | 2010 |  |  | 2011 |  |  | 2011 |
|  | RMB |  |  | RMB |  |  | US$ |
Accounts receivable |  |  | 170,820 |  |  |  | 260,246 |  |  |  | 41,349 |
Allowance for doubtful accounts |  |  | (1,431 | ) |  |  | (16,057 | ) |  |  | (2,551 | )
Accounts receivable, net |  |  | 169,389 |  |  |  | 244,189 |  |  |  | 38,798 |
|  | For the Years Ended December 31, |
|  | 2009 |  |  | 2010 |  |  | 2011 |  |  | 2011 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
Movement in allowance for doubtful accounts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of the year |  |  | 3,830 |  |  |  | 2,000 |  |  |  | 1,431 |  |  |  | 227 |
Provisions for the year |  |  | 2,402 |  |  |  | 1,431 |  |  |  | 15,377 |  |  |  | 2,443 |
Written back during the year |  |  | - |  |  |  | (2,000 | ) |  |  | (751 | ) |  |  | (119 | )
Write-offs during the year |  |  | (4,232 | ) |  |  | - |  |  |  | - |  |  |  | - |
Balance at end of the year |  |  | 2,000 |  |  |  | 1,431 |  |  |  | 16,057 |  |  |  | 2,551 |
As at December 31, 2010 and 2011, accounts receivable with carrying value of RMB7,883 and RMB21,677 (US$3,444) were used to secure bank borrowings of RMB42,865 and RMB30,599 (US$4,862) as at December 31, 2010 and 2011, respectively (see note 16).

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- Definition The entire disclosure for claims held for amounts due a company. Examples include trade accounts receivables, notes receivables, loans receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5066-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5162-111524 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3, 4 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 7: 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 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 4 -Section 08 -Paragraph k Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5074-111524 + Details
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