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TAXATION (Narrative) (Details) ¥ in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 30, 2019 | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2019 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |
Applicable tax rates |  | 25.00% | 25.00% | 25.00% | 25.00% | 25.00% | 25.00% |  |
Withholding Tax Rate |  | 10 | 10 |  |  |  |  |  |
Income tax payable |  | ¥ 0 |  | ¥ 858 |  |  |  | $ 0 |
Uncertain tax position, impact on taxes |  | 12,918 | $ 2,027 | 465 |  | ¥ 6,802 |  |  |
Accrued interest and penalties |  | 17,660 |  | 30,610 |  |  |  | 2,771 |
Unrecognized tax benefits, net deferred tax asset related to tax loss carryforwards |  | 24,213 |  | 20,975 |  |  |  | 3,800 |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate |  | 48,226 |  | 29,030 |  |  |  | 7,568 |
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest |  | ¥ 529,237 | $ 83,050 | 441,653 |  | 391,078 |  |  |
Business tax rate |  | 5 | 5 |  |  |  |  |  |
Net operating loss carryforwards |  | ¥ 529,237 |  |  |  |  |  | 83,050 |
Deferred Tax Assets, Net of Valuation Allowance |  | 47,242 |  | 54,059 |  |  |  | 7,415 |
Current Federal, State and Local, Tax Expense (Benefit) |  | 362 | $ 57 | 1,672 |  | (1,358) |  |  |
Unrecognized Tax Benefits |  | ¥ 81,901 |  | ¥ 65,093 |  | ¥ 98,984 |  | $ 12,854 | $ 10,215
Movable Property [Member] |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |
Value added tax |  | 3.00% | 3.00% |  |  |  |  |  |
Property Leasing Arrangement [Member] |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |
Value added tax | 13.00% | 17.00% | 17.00% |  |  |  |  |  |
Technical Service [Member] |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |
Value added tax |  | 6.00% | 6.00% |  |  |  |  |  |
United States of America [Member] |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |
Applicable tax rates |  | 21.00% | 21.00% | 21.00% | 21.00% | 21.00% | 21.00% |  |
SINGAPORE |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |
Income tax profits | $ |  |  | $ 0 |  | $ 0 |  | $ 0 |  |
HONG KONG |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |
Income tax profits | ¥ |  | ¥ 0 |  |  |  |  |  |  |

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