Investment in equity investees (Details) In Thousands, unless otherwise specified			12 Months Ended
Dec. 31, 2014 USD ($)	Dec. 31, 2014 CNY	Dec. 31, 2013 CNY	Dec. 31, 2014 Cost method CNY	Dec. 31, 2013 Cost method CNY
Equity investee activity [Roll Forward]
Balance at year beginning	$ 94,601	586,959	36,502	36,502	2,840
Additions				552,493	34,502
Disposals and transfers					(840)
Foreign currency translation adjustments				(2,036)
Balance at year end	$ 94,601	586,959	36,502	586,959	36,502

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Amount of increase in cost and equity method investments arising from acquisitions during the period.

+ References

No definition available.

+ Details

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- Definition

Amount of decrease in cost and equity method investments arising from disposals and transfers during the period.

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No definition available.

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- Definition

Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

+ 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 210.5-02.12)

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

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- Definition

Adjustments to temporary equity resulting from foreign currency translation adjustments.

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No definition available.

+ Details

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