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Long-term investments - Equity securities with readily determinable fair value (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Long-term investments |  |  |
Investment in public companies | ¥ 261,688 | ¥ 0 | ¥ 0
Impairment charges | ¥ 0 | ¥ 0 | ¥ 0

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- Definition Amount of impairment loss on investment in equity security with readily determinable fair value. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Amount of cash outflow to acquire investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as investing activity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 19 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-19 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 1 -SubTopic 10 -Topic 321 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479567/321-10-45-1 + Details
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