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Property, Equipment and Software, Net (Details Narrative) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Depreciation expenses $ 3,206,568 $ 2,842,787 $ 2,940,387
Office Buildings [Member]      
Collateral for short-term-bank loan $ 3,000,000