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Short-Term Investments - Schedule of Short-Term Investments Balance (Details) ¥ in Thousands, $ in Thousands | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($)
--- | --- | --- | --- | ---
Schedule Of Investments [Line Items] |  |  |  |
Short-term investments | ¥ 828,867 | $ 130,067 | ¥ 696,051 |
RMB |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |
Short-term investments | ¥ 828,867 | $ 828,867 | 617,457 | $ 617,457
US$ |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |
Short-term investments |  |  | ¥ 78,594 | $ 12,045

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