SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Foreign Currency Translation (Details)	Mar. 31, 2021	Mar. 31, 2020
Weighted Average
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]
Foreign currency exchange rate	0.154	0.143
RMB
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]
Foreign currency exchange rate	0.152	0.141
HKD
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]
Foreign currency exchange rate	0.129	0.129