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Property, Plant and Equipment, Net (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Property, Plant and Equipment [Line Items]          
Assets pledged for guarantee of Dongfang Paper capital lease $ 4,883,169   $ 4,883,169   $ 5,782,640
Land use right net values pledged for sale-leaseback financing 5,911,558   5,911,558   $ 5,990,586
Depreciation and amortization 3,859,399 $ 3,680,248 $ 7,789,459 $ 7,410,833  
Land Use Rights [Member]          
Property, Plant and Equipment [Line Items]          
Term of lease     50 years   50 years
Lease expiration year     From 2061 to 2066.   From 2061 to 2066.
Assets pledged for guarantee of Dongfang Paper capital lease 5,277,233   $ 5,277,233    
Value of land use right pledged for bank loan $ 3,356,741   $ 3,356,741