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Intangible Assets (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Summary of intangible assets    
Land use rights $ 591,734 $ 600,319
Other intangible assets 75,710 76,808
Total 667,444 677,127
Less: accumulated amortization (219,411) (203,533)
Intangible assets, net $ 448,033 $ 473,594