Prepayments, Deposits and Other Assets, net (Tables)

12 Months Ended

Dec. 31, 2020

Prepayments Deposits And Other Assets Net [Abstract]

Schedule of prepayments, deposits and other assets, net

	As of December 31,
	2020			2019
Security deposits (1)	$	385,607		$	755,886
Advances to suppliers		1,508,022			31,449
Advances to employees		215,735			18,159
Prepaid expense		293,573			377,501
Others		288,464			158,554
		2,691,401			1,341,549
Less: Long term portion		(385,607	)		(759,397	)
Allowance for doubtful accounts		(306,513	)		(31,139	)
Prepayments, deposits and other assets – current portion	$	1,999,281		$	551,013

(1) Security deposits represent contract fulfillment deposits required by customer for specific projects, rent deposits and etc.

Schedule of allowance for doubtful accounts

	As of December 31,
	2020		2019			2018
Beginning balance	$	31,139	$	14,047		$	19,422
Provision(recovery) for doubtful accounts		258,280		17,400			(4,510	)
Foreign currency translation adjustments		17,094		(308	)		(865	)
Ending balance	$	306,513	$	31,139		$	14,047