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Revenue from contracts with customers - Schedule Of Revenue Recognized (Detail)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Disclosure of performance obligations [abstract]      
Amounts included in contract liabilities ¥ 623,176 $ 86,868 ¥ 640,864