Property, Plant and Equipment, Net (Tables)

3 Months Ended

Mar. 31, 2020

Property, Plant and Equipment, Net [Abstract]

Schedule of property, plant and equipment, net

	December 31,			March 31,
	2019			2020
Buildings	$	27,262,301		$	26,812,159
Machinery and equipment		22,719,932			22,344,791
Office equipment		204,196			200,824
Motor vehicles		161,980			159,305
		50,348,409			49,517,079
Impairment		(4,126,152	)		(4,058,023	)
Accumulated depreciation		(8,044,692	)		(8,485,131	)
Carrying amount	$	38,177,565		$	36,973,925