v2.4.0.6

Benefit of Tax Holiday Per Basic and Diluted Earnings Per Share (Detail)	12 Months Ended
	Dec. 31, 2011 Earning Per Share, Basic USD ($)	Dec. 31, 2011 Earning Per Share, Basic CNY	Dec. 31, 2010 Earning Per Share, Basic CNY	Dec. 31, 2009 Earning Per Share, Basic CNY	Dec. 31, 2011 Earning Per Share, Diluted USD ($)	Dec. 31, 2011 Earning Per Share, Diluted CNY	Dec. 31, 2010 Earning Per Share, Diluted CNY	Dec. 31, 2009 Earning Per Share, Diluted CNY
Income Tax Holiday [Line Items]
Basic	$ 0.01	0.05	0.46	0.32	$ 0.01	0.05	0.45	0.30

X

- Definition

The per share effect of the aggregate dollar amount of the income tax benefit resulting from the income tax holidays granted to the entity by taxing jurisdictions.

+ References

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 11

-Section C



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 11.C)

-URI http://asc.fasb.org/extlink&oid=6889476&loc=d3e330215-122817

+ Details

Name:	us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_IncomeTaxHolidayLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration