Long-Term Investments - Schedule of Equity Securities With Readily Determinable Fair Values (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Schedule of Equity Securities With Readily Determinable Fair Values [Abstract]
Cost, Listed company	¥ 1,292	¥ 1,292
Gross unrealized gains, Listed company
Gross unrealized losses, Listed company	(1,253)	(1,190)
Fair value, Listed company	¥ 39	¥ 102

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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+ Details