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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Cost of revenue.        
Purchases from related parties $ 640,937 $ 129,401 $ 1,480,369 $ 285,383
General and administrative expense.        
Purchases from related parties $ 24,231 $ 24,299 $ 48,462 $ 28,728