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Summary of Significant Accounting Policies (Details 4)
12 Months Ended
Dec. 31, 2013
USD ($)
Dec. 31, 2013
CNY
Dec. 31, 2012
CNY
Dec. 31, 2011
CNY
Dec. 31, 2013
Shandong Borun
Dec. 31, 2013
Daqing Borun
Dec. 31, 2013
PRC
Dec. 31, 2013
Minimum
Dec. 31, 2013
Maximum
Significant Accounting Policy                  
Value-added tax charged to customers $ 7,322,746 44,646,052 41,816,583            
Value added tax rate (as a percent)               13.00% 17.00%
Input VAT paid for purchase of corn but not yet validated by the PRC Taxing Authority 6,685,667 40,761,846 14,068,225            
Consumption tax rate (as a percent) 5.00% 5.00%              
Consumption tax netted against sales revenue 13,130,434 80,054,943 95,920,874 101,796,398          
Consumption tax payable 3,338,041 20,351,703 18,206,743            
Retirement and other postretirement benefits                  
Expense for employee benefits 1,508,024 9,194,271 9,448,608 10,533,795          
Statute of limitations period             5 years    
Uncertain tax positions   0 0            
Estimated interest costs and penalties provided for uncertain tax positions   0 0 0          
Threshold percentage to determine whether statutory surplus reserves can be converted into capital 25.00% 25.00%              
Required minimum percentage of after-tax-profit allocated to statutory surplus reserve 10.00% 10.00%              
Threshold percentage of statutory surplus reserves of the registered capital, used as criteria of allocation requirement 50.00% 50.00%              
Annual percentage of after-tax-profit allocated to statutory surplus reserve         10.00% 10.00%      
Transfer to statutory reserves $ 1,304,603 7,954,033 18,815,144 31,792,528