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INVENTORIES (Details) - USD ($)
Jun. 30, 2021
Dec. 31, 2020
INVENTORIES [Abstract]    
Raw materials $ 33,058,221 $ 32,044,393
Work-in-process 49,163,125 30,293,288
Finished goods 17,478,397 19,197,918
Total inventories $ 99,699,743 $ 81,535,599