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Convertible Redeemable Preferred Shares - Additional Information (Detail) - CNY (¥)
¥ in Thousands
12 Months Ended
Mar. 31, 2021
Mar. 31, 2019
Temporary Equity [Line Items]    
Deemed dividend to holders of mezzanine equity   ¥ 89,076
Preferred Stock, Accretion of Redemption Discount   ¥ 509,904
Preferred Stock [Member]    
Temporary Equity [Line Items]    
Deemed dividend to holders of mezzanine equity ¥ 89,076