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Share-based compensation (Tables) | 12 Months Ended
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Dec. 31, 2025
Share-Based Payment Arrangement [Abstract] |
Schedule of Option Pricing Model and Adopted Fair Value Per Share | The Group uses binomial option pricing model and adopted fair value per share of ordinary share to determine fair value of the share-based awards. The estimated fair value of each option or each restricted share granted is estimated on the date of grant using the binomial option-pricing model or fair value per share of ordinary share with the following assumptions: Schedule of Option Pricing Model and Adopted Fair Value Per Share
|  | For the years ended December 31, |
Options |  | 2023 |  |  | 2024 |  |  | 2025 |
Fair value per share (US$) |  | 6.33-6.37 |  |  | 0.79~0.80 |  |  | 0.68~1.04 |
Discount rate (after tax) |  |  | Not applicable |  |  |  | Not applicable |  |  |  | Not applicable |
Risk-free interest rate |  |  | 3.88 | % |  |  | 4.58 | % |  |  | 4.11%~4.24% |
Expected volatility |  |  | 64.2 | % |  |  | 65.7 | % |  |  | 59.65%~73.81% |
Contractual term (in years) |  |  | 10 |  |  |  | 10 |  |  |  | 10 |
18. Share-based compensation (Continued)
(b) | Valuation assumptions (Continued)
|  | For the years ended December 31,
Restricted shares |  | 2023(prior to the Business Combination) |  | 2024 |  | 2025
Fair value per share (US$) |  | 4.90-5.45 |  | Not applicable |  | Not applicable
Discount rate (after tax) |  | 15.0%-16.0% |  | Not applicable |  | Not applicable
Discount for lack of marketability (“DLOM”) |  | 5%-10% |  | Not applicable |  | Not applicable
Schedule of Stock Options Activities | The following table presents a summary of the Company’s stock options activities for the years ended December 31, 2023, 2024 and 2025. Schedule of Stock Options Activities
|  | Number of Options Outstanding* |  |  | Weighted Average exercise |  |  | Weighted average remaining contractual |  |  | Aggregated |
|  | Employees |  |  | Consultant |  |  | Total |  |  | price |  |  | life |  |  | intrinsic value |
|  | (in thousands) |  |  | (in thousands) |  |  | (in thousands) |  |  | US$ |  |  | (in years) |  |  | RMB in thousands |
Outstanding at January 1, 2023 |  |  | 7,618 |  |  |  | 331 |  |  |  | 7,949 |  |  |  | 1.7905 |  |  |  | 4.67 |  |  |  | 65,572 |
Replacement |  |  | (7,545 | ) |  |  | (331 | ) |  |  | (7,876 | ) |  |  | 1.3119 |  |  |  | - |  |  |  | - |
Granted |  |  | 528 |  |  |  | - |  |  |  | 528 |  |  |  | 0.1000 |  |  |  | - |  |  |  | - |
Forfeited |  |  | (28 | ) |  |  | - |  |  |  | (28 | ) |  |  | 8.1954 |  |  |  | - |  |  |  | - |
Outstanding at December 31, 2023 |  |  | 573 |  |  |  | - |  |  |  | 573 |  |  |  | 0.6675 |  |  |  | 9.73 |  |  |  | 23,775 |
Exercisable as of December 31, 2023 |  |  | 295 |  |  |  | - |  |  |  | 295 |  |  |  | 1.1978 |  |  |  | 9.48 |  |  |  | 11,367 |
Outstanding at January 1, 2024 |  |  | 573 |  |  |  | - |  |  |  | 573 |  |  |  | 0.6675 |  |  |  | 9.73 |  |  |  | 23,775 |
Replacement |  |  | (22 | ) |  |  | - |  |  |  | (22 | ) |  |  | 7.3437 |  |  |  | - |  |  |  | - |
Granted |  |  | 899 |  |  |  | - |  |  |  | 899 |  |  |  | 0.1000 |  |  |  | - |  |  |  | - |
Exercised |  |  | (1 | ) |  |  | - |  |  |  | (1 | ) |  |  | 0.1000 |  |  |  | - |  |  |  | - |
Forfeited |  |  | (47 | ) |  |  | - |  |  |  | (47 | ) |  |  | 0.9706 |  |  |  | - |  |  |  | - |
Outstanding at December 31, 2024 |  |  | 1,402 |  |  |  | - |  |  |  | 1,402 |  |  |  | 0.1785 |  |  |  | 9.32 |  |  |  | 7,990 |
Exercisable as of December 31, 2024 |  |  | 733 |  |  |  | - |  |  |  | 733 |  |  |  | 0.2498 |  |  |  | 9.27 |  |  |  | 4,147 |
Outstanding at January 1, 2025 |  |  | 1,402 |  |  |  | - |  |  |  | 1,402 |  |  |  | 0.1785 |  |  |  | 9.32 |  |  |  | 7,990 |
Granted |  |  | 323 |  |  |  | 431 |  |  |  | 754 |  |  |  | 0.0486 |  |  |  | - |  |  |  | - |
Exercised |  |  | (148 | ) |  |  | - |  |  |  | (148 | ) |  |  | 0.1000 |  |  |  | - |  |  |  | - |
Forfeited |  |  | (24 | ) |  |  | - |  |  |  | (24 | ) |  |  | 0.1000 |  |  |  | - |  |  |  | - |
Outstanding at December 31, 2025 |  |  | 1,553 |  |  |  | 431 |  |  |  | 1,984 |  |  |  | 0.1358 |  |  |  | 8.81 |  |  |  | 10,332 |
Exercisable as of December 31, 2025 |  |  | 1,076 |  |  |  | 431 |  |  |  | 1,507 |  |  |  | 0.1471 |  |  |  | 8.86 |  |  |  | 7,894 |
* | Shares outstanding for all periods reflect the adjustment for Reverse Recapitalization (Note 3).
Schedule of Restricted Share Activities | The following table sets forth the summary of restricted share activities for the years ended December 31, 2023, 2024 and 2025: Schedule of Restricted Share Activities
|  | Number of Restricted Shares Granted* |  |  | Weighted-Average Grant Date Fair Value |
|  | (in thousands) |  |  | (US$) |
Unvested as of January 1, 2023 |  |  | 786 |  |  |  | 4.8435 |
Replacement |  |  | 7,876 |  |  |  | 4.9821 |
Awarded |  |  | 703 |  |  |  | 6.4017 |
Vested |  |  | (8,938 | ) |  |  | 5.0743 |
Forfeited |  |  | (97 | ) |  |  | 5.5168 |
Outstanding at December 31, 2023 |  |  | 330 |  |  |  | 5.0233 |
Unvested as of January 1, 2024 |  |  | 330 |  |  |  | 5.0233 |
Replacement |  |  | 22 |  |  |  | 4.2700 |
Awarded |  |  | 1,589 |  |  |  | 1.6553 |
Vested |  |  | (1,757 | ) |  |  | 1.9938 |
Forfeited |  |  | (77 | ) |  |  | 4.9078 |
Outstanding at December 31, 2024 |  |  | 107 |  |  |  | 4.6904 |
Unvested as of January 1, 2025 |  |  | 107 |  |  |  | 4.6904 |
Awarded |  |  | 1,835 |  |  |  | 0.9875 |
Vested |  |  | (1,191 | ) |  |  | 1.3719 |
Forfeited |  |  | (731 | ) |  |  | 0.8407 |
Outstanding at December 31, 2025 |  |  | 20 |  |  |  | 3.3155 |
* | Shares outstanding for all periods reflect the adjustment for Reverse Recapitalization (Note 3).

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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