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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Disaggregation of revenue (Details) - USD ($)
6 Months Ended 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Disaggregation of Revenue [Line Items]          
Revenue $ 11,876,023 $ 246,552      
Tax and surcharges (3,602) (628)      
Net Revenues 11,872,421 245,924      
Retained earnings (52,297,338)   $ (53,107,676)    
Commission service          
Disaggregation of Revenue [Line Items]          
Revenue 17,710 59,664      
Cash incentives (16,152) (52,451)      
Recommendation service          
Disaggregation of Revenue [Line Items]          
Revenue     $ 0 $ 0 $ 3,754,738
Revenue from medical devices          
Disaggregation of Revenue [Line Items]          
Revenue 11,858,313        
Interest income          
Disaggregation of Revenue [Line Items]          
Revenue $ 0 $ 186,888