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Fair Value Measurement (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 CNY (¥)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Impairment​ of long-term investments | ¥ 486,500 | $ 66,644 | ¥ 278,891 | ¥ 465,645
Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Impairment​ of long-term investments | ¥ 486,500 |  | ¥ 278,900 |

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- Definition Impairment​ of long-term investments. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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