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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impairment of long lived assets, Advertising and promotion expenses, Research and development costs, Lease and Income taxes (Details) - USD ($)
12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES      
Impairment of long-lived assets $ 0 $ 0 $ 0
Advertising and promotion expenses 5,886 176,193 736,522
Research and development costs $ 421,186 $ 441,405 $ 117,942
Operating lease term 1 year