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Leases (Details) - CNY (¥)
¥ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Leases [Abstract]      
Weighted average lessee's incremental borrowing rate applied to lease liabilities recognised at date of initial application of IFRS 16 4.18% 4.18%  
Cash outflows in operating activities for leases ¥ 19.8 ¥ 16.7 ¥ 9.7