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v3.23.1

TAXATION (Details) ¥ in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 30, 2019 | Dec. 31, 2022 CNY (¥) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
TAXATION |  |  |  |  |  |  |  |  |
Applicable tax rates |  | 25.00% | 25.00% | 25.00% | 25.00% | 25.00% | 25.00% |  |
Current income tax for federal and state for US Proton |  | ¥ 196 | $ 28 | ¥ 362 |  | ¥ 1,672 |  |  |
Withholding tax rate |  | 10 | 10 |  |  |  |  |  |
Net operating loss carryforwards |  | ¥ 839,896 |  |  |  |  |  | $ 121,772 |
Unrecognized tax benefits |  | 67,172 |  | 81,901 |  | 65,093 |  | 9,739 | $ 11,875
Unrecognized tax benefits, net deferred tax asset related to tax loss carryforwards |  | 19,962 |  | 24,213 |  |  |  | 2,894 |
Unrecognized tax benefits which affect the annual effective tax rate |  | 39,412 |  | 48,226 |  |  |  | 5,714 |
Uncertain tax position, impact on taxes |  | 7,254 | $ 1,052 | 12,918 |  | ¥ 465 |  |  |
Accrued interest and penalties |  | ¥ 13,091 |  | ¥ 17,660 |  |  |  | $ 1,898 |
Business tax rate |  | 5 | 5 |  |  |  |  |  |
Movable property |  |  |  |  |  |  |  |  |
TAXATION |  |  |  |  |  |  |  |  |
Value added tax |  | 3.00% | 3.00% |  |  |  |  |  |
Property leasing arrangement |  |  |  |  |  |  |  |  |
TAXATION |  |  |  |  |  |  |  |  |
Value added tax | 13.00% | 17.00% | 17.00% |  |  |  |  |  |
Technical service |  |  |  |  |  |  |  |  |
TAXATION |  |  |  |  |  |  |  |  |
Value added tax |  | 6.00% | 6.00% |  |  |  |  |  |
United States |  |  |  |  |  |  |  |  |
TAXATION |  |  |  |  |  |  |  |  |
Applicable tax rates |  | 21.00% | 21.00% | 21.00% | 21.00% | 21.00% | 21.00% |  |
Singapore |  |  |  |  |  |  |  |  |
TAXATION |  |  |  |  |  |  |  |  |
Income tax profits | $ |  |  | $ 0 |  | $ 0 |  | $ 0 |  |
Hong Kong |  |  |  |  |  |  |  |  |
TAXATION |  |  |  |  |  |  |  |  |
Income tax profits | ¥ |  | ¥ 0 |  |  |  |  |  |  |

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