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Fair value measurements (Tables) | 12 Months Ended
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Dec. 31, 2025
Fair value measurements |
Summary of financial instruments measured at fair value on recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | As of December 31, 2024
​ | ​ | Level 1 | ​ ​ ​ | Level 2 | ​ ​ ​ | Level 3 | ​ ​ ​ | Total
​ | ​ | RMB | ​ | RMB | ​ | RMB | ​ | RMB
Assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available-for-sale debt investments (i) |  | — |  | — |  | 283,054 |  | 283,054
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31, 2025
​ | ​ ​ ​ | Level 1 | ​ ​ ​ | Level 2 | ​ ​ ​ | Level 3 | ​ ​ ​ | Total
​ | ​ | RMB | ​ | RMB | ​ | RMB | ​ | RMB
Assets |  | ​ |  | ​ |  | ​ |  | ​
Available-for-sale debt investments (i) |  | — |  | — |  | 163,027 |  | 163,027
| (i) | Available-for-sale debt investments are investments made by the Group without readily determinable fair values as set out in Note 9, which were categorized as Level 3 in the fair value hierarchy. These investments were valued based on a model utilizing unobservable inputs requiring significant management judgment and estimation. The Company uses a combination of valuation methodologies, including income approaches based on the Company’s best estimate, which is determined by using information including but not limited to future cash flow forecasts, liquidity factors and multiples of a selection of comparable companies.
Summary of roll forward of Level 3 investments | ​
​ | ​ | ​
​ | ​ ​ ​ | Total
Fair value of Level 3 investments as at December 31, 2023 |  | 428,512
New additions |  | —
Recognised in net loss | ​ | (66,339)
Recognised in other comprehensive income (loss) | ​ | (79,119)
Fair value of Level 3 investments as at December 31, 2024 |  | 283,054
New additions |  | —
Recognised in net loss | ​ | (76,458)
Recognised in other comprehensive income (loss) | ​ | (43,569)
Fair value of Level 3 investments as at December 31, 2025 |  | 163,027

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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