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Net loss per share (Tables) | 12 Months Ended
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Dec. 31, 2025
Net loss per share |
Schedule of basic and diluted net loss per share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | For the years ended December 31,
​ | ​ ​ ​ | 2023 | ​ ​ ​ | 2024 | ​ ​ ​ | 2025
​ | ​ | RMB | ​ | RMB | ​ | RMB
Numerator: |  | ​ |  | ​ |  | ​
Net loss attributable to ordinary shareholders |  | (204,519) |  | (47,955) |  | (112,591)
Numerator for basic and diluted net loss per share |  | (204,519) |  | (47,955) |  | (112,591)
Denominator: |  | ​ |  | ​ |  | ​
Denominator for basic calculation—weighted average number of Class A and Class B ordinary shares outstanding |  | 243,025,428 |  | 231,533,388 |  | 228,840,636
Denominator for diluted calculation |  | 243,025,428 |  | 231,533,388 |  | 228,840,636
Net loss per ordinary share |  | ​ |  | ​ |  | ​
—Basic |  | (0.84) |  | (0.21) |  | (0.49)
—Diluted |  | (0.84) |  | (0.21) |  | (0.49)
Net loss per ADS* |  | ​ |  | ​ |  | ​
—Basic |  | (0.84) |  | (0.21) |  | (0.49)
—Diluted |  | (0.84) |  | (0.21) |  | (0.49)
*Each ADS represents one Class A ordinary share.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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