Interest Expense - Schedule of Interest Expense (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
Mar. 31, 2025 CNY (¥)	Mar. 31, 2025 USD ($)	Mar. 31, 2024 CNY (¥)	Mar. 31, 2023 CNY (¥)
Schedule of Interest Expense [Abstract]
Amortization charges on promissory notes	¥ 5,974		¥ 5,058	¥ 9,706
Interest expense on borrowings	532		2,268	3,644
Total	¥ 6,506	$ 897	¥ 7,326	¥ 13,350

Amount of amortization expense attributable to debt issuance costs.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
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-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-3

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