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Property, plant and equipment, net (Details) - Schedule of property, plant and equipment, net - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	$ 256,945,869	$ 258,733,248
Less: accumulated depreciation and amortization	(116,836,042)	(113,590,606)
Property, Plant and Equipment, net	140,109,827	145,142,642
Land use rights [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	12,409,356	12,497,601
Building and improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	80,659,574	81,233,162
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	162,639,111	163,787,807
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	655,751	628,462
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, gross	$ 582,077	$ 586,216

X

- Definition

Amount of increase (decrease) in accumulated depreciation, depletion and amortization of property, plant and equipment.

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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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