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Shipping and Handling Expenses - Summary of Sales Related Shipping and Handling Expenses Not Separately Billed to Customers (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 CNY (¥)
Disclosure of income statement [line items] |  |  |  |
Shipping and handling expenses | ¥ 152,696 | $ 21,285 | ¥ 150,973 | ¥ 150,661
Cost of sales [member] |  |  |  |
Disclosure of income statement [line items] |  |  |  |
Shipping and handling expenses | 129,572 | 18,062 | 129,954 | 132,117
Selling, general and administrative expense [member] |  |  |  |
Disclosure of income statement [line items] |  |  |  |
Shipping and handling expenses | ¥ 23,124 | $ 3,223 | ¥ 21,019 | ¥ 18,544

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