7. ACCOUNTS AND OTHER PAYABLE AND ACCRUED EXPENSE (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Accounts payable	$ 1,040,950	$ 479,958
Salary payable	318,291	320,549
Social security insurance contribution payable	101,446	49,167
Other payable-related party (see Note 8)	23,738	95,616
Deposit on subscription of a subsidiary's share	152,180	153,260
Accrued expense-construction	6,296,071	3,537,644
Accrued expense-others	617,213	445,507
Total	$ 8,549,889	$ 5,081,701