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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impairment of long lived assets to Employee defined contribution plan (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Impairment of long lived assets      
Impairment loss $ 0 $ 0 $ 0
Employee defined contribution plan      
Employee benefit expenses $ 2,984,251 $ 2,223,493 $ 622,377