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Fair value estimation - Summary of Fair Value of Financial Instruments (Detail) - CNY (¥)
¥ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Disclosure of fair value measurement of assets [line items]    
Financial assets at fair value through profit or loss ¥ 16,275 ¥ 11,753
Financial assets at fair value through other comprehensive income 107,444 129,060
Financial assets, at fair value 123,719 ¥ 140,813
Recurring fair value measurements    
Disclosure of fair value measurement of assets [line items]    
Financial assets at fair value through profit or loss 16,275  
Financial assets at fair value through other comprehensive income 107,444  
Financial assets, at fair value 123,719  
Level 1 | Recurring fair value measurements    
Disclosure of fair value measurement of assets [line items]    
Financial assets at fair value through other comprehensive income 107,444  
Financial assets, at fair value 107,444  
Level 3 | Recurring fair value measurements    
Disclosure of fair value measurement of assets [line items]    
Financial assets at fair value through profit or loss 16,275  
Financial assets, at fair value ¥ 16,275