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Staff cost - Summary of Staff Costs (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥)
Disclosure of income statement [line items] |  |  |  |
Wages and salaries | ¥ 1,193,214 | $ 167,973 | ¥ 928,350 | ¥ 1,338,777
Contribution to defined contribution plans | 354,014 | 49,836 | 371,458 | 386,551
Executive bonuses | 24,200 | 3,407 | 16,500 | 19,355
Staff welfare | 74,727 | 10,520 | 79,206 | 93,992
Staff severance cost | 35,547 | 5,004 | 19,531 | 11,771
Others | 3,542 | 499 | 3,875 | 4,887
Staff costs | ¥ 1,685,244 | $ 237,239 | ¥ 1,418,920 | ¥ 1,855,333

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