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ACCOUNTS RECEIVABLE (Tables) | 12 Months Ended
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Dec. 31, 2015
ACCOUNTS RECEIVABLE [Abstract] |
Schedule of Accounts Receivable |
|  | As at December 31, |
|  | 2014 |  |  | 2015 |  |  | 2015 |
|  | RMB |  |  | RMB |  |  | US$ |
Accounts receivable |  |  | 267,291 |  |  |  | 220,035 |  |  |  | 33,968 |
Allowance for doubtful accounts |  |  | (2,281 | ) |  |  | (1,781 | ) |  |  | (275 | )
Accounts receivable, net |  |  | 265,010 |  |  |  | 218,254 |  |  |  | 33,693 |
|  | For the Years Ended December 31, |
|  | 2013 |  |  | 2014 |  |  | 2015 |  |  | 2015 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
The movement in the allowance for doubtful accounts were as follows: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the year |  |  | 3,091 |  |  |  | 3,091 |  |  |  | 2,281 |  |  |  | 352 |
Acquisition of CHS |  |  | — |  |  |  | — |  |  |  | 167 |  |  |  | 26 |
Provisions for the year |  |  | — |  |  |  | 700 |  |  |  | 2,925 |  |  |  | 452 |
Reversal of provisions from prior periods due to subsequent cash collection during the year |  |  | — |  |  |  | (1,510 | ) |  |  | (749 | ) |  |  | (116 | )
Amounts written off during the year |  |  | — |  |  |  | — |  |  |  | (2,843 | ) |  |  | (439 | )
Balance at the end of the year |  |  | 3,091 |  |  |  | 2,281 |  |  |  | 1,781 |  |  |  | 275 |

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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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