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v3.25.2

Taxes (Details 1) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Continuing Operations [Member] |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
China statutory income tax rate | 25.00% |  |
Preferential tax rate reduction | (19.30%) |  |
200% deduction on research and development expenses | (1.00%) |  |
Change in valuation allowance | (4.00%) |  |
Permanent difference | (12.60%) |  |
Others | 6.10% |  |
Effective tax rate | (5.80%) |  |
Discontinued Operations [Member] |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
China statutory income tax rate |  | 25.00% | 25.00%
Preferential tax rate reduction |  | (9.60%) | (8.40%)
200% deduction on research and development expenses |  |  |
Tax rate difference outside of PRC |  |  | (3.40%)
Change in valuation allowance |  | (15.30%) | (12.60%)
Permanent difference |  | (0.10%) | (0.10%)
Effective tax rate |  |  | 0.50%

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