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v3.26.1

TAXATION (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2025 CNY (¥) | Dec. 31, 2025 USD ($) | Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($)
TAXATION |  |  |  |  |  |  |
Applicable tax rates | 25.00% | 25.00% | 25.00% | 25.00% | 25.00% |  |
Current income tax for federal and state for US Proton | ¥ 700 | $ 100 | ¥ (2,183,000) |  | ¥ 404,000 |  |
Withholding tax rate | 10 | 10 |  |  |  |  |
Net operating loss carryforwards | ¥ 2,367,847,000 |  |  |  |  | $ 338,598,000 |
Unrecognized tax benefits | 76,215,000 |  | 67,799,000 |  | 63,899,000 | 10,898,000 | $ 9,695,000
Unrecognized tax benefits, net deferred tax asset related to tax loss carryforwards | 34,832,000 |  | 32,728,000 |  |  | 4,981,000 |
Unrecognized tax benefits which affect the annual effective tax rate | 45,385,000 |  | 36,036,000 |  |  | 6,490,000 |
Uncertain tax position, impact on taxes | 163,000 | $ 23,000 | (2,473,000) |  | ¥ (6,121,000) |  |
Accrued interest and penalties | ¥ 10,315,000 |  | ¥ 9,433,000 |  |  | $ 1,475,000 |
United States |  |  |  |  |  |  |
TAXATION |  |  |  |  |  |  |
Applicable tax rates | 21.00% | 21.00% | 21.00% | 21.00% | 21.00% |  |
Singapore |  |  |  |  |  |  |
TAXATION |  |  |  |  |  |  |
Income tax profits | $ |  | $ 0 |  | $ 0 |  |  |
Hong Kong |  |  |  |  |  |  |
TAXATION |  |  |  |  |  |  |
Income tax profits | ¥ | ¥ 0 |  |  |  |  |  |

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