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Related Party Transactions - Schedule Of Related Party Balances (Detail) ¥ in Thousands, $ in Thousands | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥)
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Amounts due from related parties: |  |  |
Amounts due from related parties | ¥ 212,901 | $ 33,409 | ¥ 210,826
Amounts due to related parties: |  |  |
Amounts due to related parties | 1,309,317 | 205,461 | 112,998
Kingsoft Group [Member] |  |  |
Amounts due from related parties: |  |  |
Amounts due from related parties | 37,731 | 5,921 | 45,258
Amounts due to related parties: |  |  |
Amounts due to related parties | 544,376 | 85,425 | 80,294
Xiaomi Group [Member] |  |  |
Amounts due from related parties: |  |  |
Amounts due from related parties | 175,170 | 27,488 | 165,568
Amounts due to related parties: |  |  |
Amounts due to related parties | ¥ 764,941 | $ 120,036 | ¥ 32,704

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