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Redeemable non-controlling interests - Additional Information (Detail) - CNY (¥)
¥ in Thousands
12 Months Ended
Oct. 31, 2020
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Equity, shares issued 120,000      
Redeemable preferred shares issued amount     ¥ 413,377  
Accretion of redemption value of the redeemable non-controlling interest   ¥ (575) (138)
Redeemable non controlling interest equity carrying amount total   ¥ 6,500 ¥ 5,900  
Yoken Holding Limited [Member]        
Redeemable preferred shares issued amount ¥ 6,000      
Percentage of preferred shares redeemable at redemption price measured by Interest per year Since Issuance of shares 10.00%