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Taxation - Schedule of Movement of Valuation Allowance (Detail) - CNY (¥) ¥ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Balance at beginning of the period	¥ 752,907	¥ 860,698	¥ 780,179
Addition	16,934	21,180	83,516
Written off for expiration of net operating losses	(225,742)	(125,803)
Utilization of previously unrecognized tax loss and un-deductible advertising expenses	(3,126)	(3,168)	(2,997)
Balance at end of the period	¥ 540,973	¥ 752,907	¥ 860,698

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- Definition

Deferred Tax Assets Valuation Allowance Additions

+ References

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- Definition

Deferred Tax Assets Valuation Allowance, Utilization of previously unrecognized tax loss and un-deductible advertising expenses.

+ References

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- Definition

Deferred Tax Assets Valuation Allowance Written Off.

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

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