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Financial risk management and fair values - Liquidity risk (Details) - CNY (¥)
12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Financial risk management and fair values      
Net Current assets ¥ 4,283,891,000 ¥ 5,716,232,000  
Net cash generated from operating activities ¥ 1,406,262,000 ¥ 916,320,000 ¥ 826,484,000