Goodwill - Schedule of Changes in the Carrying Amount of Goodwill (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
Mar. 31, 2023	Mar. 31, 2025	Mar. 31, 2024
Schedule of Changes in the Carrying Amount of Goodwill [Abstract]
Goodwill	¥ 40,684	¥ 40,684	¥ 40,684
Accumulated impairment loss	(40,684)	(40,684)	(40,684)
Total
Transaction during the year
Impairment

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details