Other Assets Current (Detail) In Thousands, unless otherwise specified	Dec. 31, 2012 USD ($)	Dec. 31, 2012 CNY	Dec. 31, 2011 CNY
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
Prepaid expenses	$ 22,982	143,180	31,838
Advances to suppliers	17,179	107,024	24,452
Receivables from financial institutions	0	0	200,494
Others	20,898	130,203	58,228
Other assets, current	$ 61,059	380,407	315,012

Advances to Suppliers Current

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- Definition

Receivables from financial institution represent entrusted loans to certain financial institutions, secured by bank notes endorsed to the trusted agency.

+ References

No definition available.

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- Definition

Aggregate carrying amount, as of the balance sheet date, of current assets not separately disclosed in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer).

+ 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 210.5-02.8)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 8

-Article 5

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- Definition

Carrying amount, as of the balance sheet date, of current assets which have not been itemized or categorized in the footnotes to the financial statements and are a component of Other Assets, Current (OtherAssetsCurrent). Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer).

+ References

No definition available.

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- Definition

Carrying amount as of the balance sheet date of expenditures made, not otherwise specified in the taxonomy, in advance of the timing of recognition of expenses which are expected to be charged against earnings within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section A

-Paragraph 4

-Chapter 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 1

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6676-107765

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6787-107765

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