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Prepaid expenses and other current assets (Tables)
12 Months Ended
Dec. 31, 2020
Prepaid Expense and Other Assets [Abstract]  
Schedule of prepaid expenses and other current assets
Prepaid expenses and other current assets consist of the following at year end:
 20202019
Prepaid taxes$48,781 $73,932 
Prepaid expenses 30,175 24,266 
Promotion items and related advances20,701 19,092 
Others812 322 
 $100,469 $117,612