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Accrued Expenses and Other Current Liabilities (Tables)
12 Months Ended
Dec. 31, 2020
Payables And Accruals [Abstract]  
Schedule of other payables and other current liabilities
   2020   2019 
Accrued salaries and social welfare  $382,769   $663,929 
Accrued expenses   348,023    572,932 
Reimbursed employee’s expense   8,174    27,460 
Deposits from customers   117,204    253,014 
Others   10,164    13,1383 
Total accrued expenses and other current liabilities  $866,334   $1,530,473