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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

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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.

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