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Equity Investments - Equity method investments - (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items]        
Investment capital contribution returned     ¥ 1,100  
Income (loss) from investments ¥ (3,924) ¥ (15,964) (11,125)  
Investments in Two Limited Partnerships        
Schedule Of Equity Method Investments [Line Items]        
Investment amounts 18,800 22,700    
Total considerations       ¥ 60,000
Income (loss) from investments ¥ 3,900 ¥ 16,200 ¥ 11,600