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Business combination under common control - The acquisition in January 2022 (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2024 CNY (¥)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 CNY (¥)	Dec. 22, 2023	Dec. 31, 2022 CNY (¥)	Jan. 20, 2022 CNY (¥)
Business combination under common control
Goodwill	¥ 463,796	$ 63,540	¥ 456,976		¥ 449,357
A global mobile application service provider
Business combination under common control
Percentage of voting interests acquired			100.00%	100.00%
A wholly-owned subsidiary of Tencent \| A global mobile application service provider
Business combination under common control
Percentage of voting interests acquired						100.00%
Deferred tax liabilities						¥ (26,550)
Goodwill						444,086
Total cash consideration						573,714
A wholly-owned subsidiary of Tencent \| A global mobile application service provider \| Platform content
Business combination under common control
Identifiable intangible assets acquired						113,468
A wholly-owned subsidiary of Tencent \| A global mobile application service provider \| Trademark
Business combination under common control
Identifiable intangible assets acquired						35,060
A wholly-owned subsidiary of Tencent \| A global mobile application service provider \| Technology
Business combination under common control
Identifiable intangible assets acquired						¥ 7,650