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Summary of Significant Accounting Policies (Details) - Schedule of accounts receivable - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Schedule of accounts receivable [Abstract]    
Accounts receivable $ 34,964,280 $ 32,171,255
Allowance for doubtful accounts (23,935,726) (22,138,541)
Accounts receivable, net $ 11,028,554 $ 10,032,714