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Intangible Assets, Net (Details) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Summary of intangible asset    
Deposit for land use right $ 1,240,448 $ 1,215,480
New product technology, net 485,308 475,540
Other 7,640 1,330
Gross 1,733,396 1,692,350
Less: Accumulated amortization (545,967) (454,325)
Intangible assets, net $ 1,187,429 $ 1,238,025