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Income Taxes - Summary of Group's Loss before Income Taxes (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 (¥)
Total loss before income tax | ¥ (340,741) | $ (46,683) | ¥ (651,301) | ¥ (969,248)
PRC |  |  |  |
Total loss before income tax | (305,469) | (41,850) | (604,997) | (892,612)
Non PRC [Member] |  |  |  |
Total loss before income tax | ¥ (35,272) | $ (4,833) | ¥ (46,304) | ¥ (76,636)

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