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INCOME TAX (Details) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2018 HKD ($) item | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
INCOME TAX |  |  |  |  |
Income tax rate (as a percent) |  |  | 25.00% | 25.00% | 25.00%
PRC |  |  |  |  |
INCOME TAX |  |  |  |  |
Income tax rate (as a percent) |  |  | 25.00% |  |
Hong Kong SAR |  |  |  |  |
INCOME TAX |  |  |  |  |
Income tax rate (as a percent) | 16.50% |  | 16.50% |  |
Amount of first assessable profits earned will be taxed at half the current tax rate | $ | $ 2 |  |  |  |
Tax rate for first HK$2 million of assessable profits earned | (8.25%) |  |  |  |
Number of entities to be nominated and benefit from the progressive rates | item | 1 |  |  |  |
Singapore |  |  |  |  |
INCOME TAX |  |  |  |  |
Income tax rate (as a percent) |  |  | 17.00% |  |
High and New Technology Enterprise | PRC |  |  |  |  |
INCOME TAX |  |  |  |  |
Income tax rate (as a percent) |  | 15.00% | 15.00% | 15.00% |

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