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ACCOUNTS RECEIVABLE, NET (Details) - USD ($)
Sep. 30, 2020
Mar. 31, 2020
Mar. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Less: Unearned interest $ (69,953) $ (105,083)  
Less: Allowance for doubtful accounts (242,970) (379,689) $ 0
Accounts receivable, net 1,466,251 1,542,723  
Accounts receivable, net, current portion 867,576 660,645  
Accounts receivable, net, noncurrent portion 598,675 882,078  
Receivables of automobile sales due from automobile purchasers      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Accounts receivable, gross 1,089,778 1,172,765  
Receivables of services fees due from automobile purchasers      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Accounts receivable, gross $ 689,396 $ 854,730