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Parent company only condensed financial information - Interest in subsidiaries and amount due from subsidiaries (Details) - Parent company - CNY (¥)
¥ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Interest in subsidiaries    
Equity investment in subsidiaries ¥ 1,492,100 ¥ 2,181,554
Amount due from subsidiaries    
Loan receivables ¥ 1,075,885 ¥ 803,173