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Related party transactions - Summary of Transactions Due To Related Parties (Detail) - CNY (¥)
¥ in Thousands
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Schedule Of Transactions Due To Related Parties [Line Items]      
Advances from related parties ¥ 11,521
Nanjing Animal Pharmaceutical [Member]      
Schedule Of Transactions Due To Related Parties [Line Items]      
Trade payables to related parties 219 874 45
Beijing Petdog [Member]      
Schedule Of Transactions Due To Related Parties [Line Items]      
Advances from related parties 36
Yingzhi (Lisa) Tang [Member]      
Schedule Of Transactions Due To Related Parties [Line Items]      
Long-term loan from related parties 2,521
Yan Jiang [Member]      
Schedule Of Transactions Due To Related Parties [Line Items]      
Long-term loan from related parties ¥ 9,000