Commitments and Contingencies (Details 2) (Guarantee of short-term bank loans)	Dec. 31, 2013 Third parties guaranteed USD ($)	Dec. 31, 2013 Third parties guaranteed CNY	Dec. 31, 2012 Third parties guaranteed CNY	Dec. 31, 2013 Granaries guaranteed CNY	Dec. 31, 2012 Granaries guaranteed CNY
Commitments and contingencies
Guaranteed amount	$ 34,443,734	210,000,000	512,440,000	0	412,400,000

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)(1)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant