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Finance costs - Summary of Finance Costs (Detail)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
CNY (¥)
Profit or loss [abstract]        
Bank term loans ¥ 57,956 $ 8,079 ¥ 59,672 ¥ 65,440
Bills and other discounting 14,369 2,003 33,946 23,922
Bank charges 3,943 549 4,588 4,563
Interest on lease liabilities 1,714 239 1,969 1,547
Finance costs ¥ 77,982 $ 10,870 ¥ 100,175 ¥ 95,472