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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Significant Risks and Uncertainties (Details) | 12 Months Ended |
--- | --- | ---
Mar. 31, 2022 USD ($) customer item | Mar. 31, 2021 USD ($) | Mar. 31, 2022 CNY (¥) | Mar. 31, 2022 HKD ($)
Cash and Cash Equivalents [Line Items] |  |  |  |
Cash and cash equivalents | $ 21,925,322 | $ 15,128,719 |  |
Upper limit amount of deposits at each bank covered by insurance | 79,000 |  | ¥ 500,000 |
Amount not covered by issuance | 13,494,326 |  |  |
Maximum compensation limit | 64,000 |  |  | $ 500,000
Insurance coverage amount | 250,000 |  |  |
Amount not covered by issuance | $ 7,759,312 |  |  |
Number of customers | customer | 1 |  |  |
Revenues | Customer Concentration Risk | Customer 2 |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |
Concentration of credit risk | 95.10% |  |  |
Purchases | Supplier concentration risk | Customer 1 |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |
Number of Vendors | item | 1 |  |  |
Concentration of credit risk | 100.00% | 0.00% |  |
HONG KONG |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |
Cash balance subject to credit risk | $ 0 |  |  |
RMB |  |  |  |
Cash and Cash Equivalents [Line Items] |  |  |  |
Cash and cash equivalents | $ 13,843,088 | $ 15,128,719 |  |

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