Accounts Receivable, net (Tables)

12 Months Ended

Dec. 31, 2020

Receivables [Abstract]

Schedule of accounts receivable, net

	As of December 31
	2020			2019
Accounts receivable	$	15,896,127		$	12,910,734
Less: Allowance for doubtful accounts		(1,581,142	)		(1,669,658	)
Total accounts receivable, net	$	14,314,985		$	11,241,076

Schedule of movement of allowance for doubtful accounts

	As of December 31,
	2020			2019			2018
Beginning balance	$	1,669,658		$	392,533		$	36,285
Provision (reverse) for doubtful accounts		-			3,276,200			372,635
Recovery		(189,286	)		-			-
Written-off		-			(1,984,244	)		-
Foreign currency translation adjustments		100,770			(14,831	)		(16,387	)
Ending balance	$	1,581,142		$	1,669,658		$	392,533