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Loans and borrowings - Carrying amount of loans and borrowings (Details) - CNY (¥)
¥ in Thousands
Jun. 30, 2022
Jun. 30, 2021
Disclosure of detailed information about borrowings [line items]    
Non-current liabilities ¥ 6,503 ¥ 6,925
Current liabilities 445 13,669
Unsecured bank loans    
Disclosure of detailed information about borrowings [line items]    
Current liabilities   8,921
Borrowings from non-controlling interest shareholders    
Disclosure of detailed information about borrowings [line items]    
Non-current liabilities 6,503 6,612
Current liabilities 133 4,748
Other borrowings    
Disclosure of detailed information about borrowings [line items]    
Non-current liabilities   ¥ 313
Current liabilities ¥ 312