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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Income Taxes (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Income Tax Expense [Abstract] |  |  |
Interest or penalties associated with tax position |  | $ 0 | $ 0
Unrecognized tax positions |  | $ 0 | $ 0
Hong Kong [Member] |  |  |
Income Tax Expense [Abstract] |  |  |
Period of prior tax assessment years from investigation | 6 years |  |
Extended period of prior tax assessment years from investigation | 10 years |  |
PRC [Member] |  |  |
Income Tax Expense [Abstract] |  |  |
Statute of limitations related to income tax examinations | 3 years |  |
Statute of limitations related to income tax examinations, under special circumstance | 5 years |  |
Statute of limitations related to income tax examinations, underpayment of taxes | ¥ | ¥ 100,000 |  |
Statute of limitations related to income tax examinations, transfer pricing issues | 10 years |  |
U.S. Federal [Member] |  |  |
Income Tax Expense [Abstract] |  |  |
Open tax examination years | 2013 2014 2015 2016 2017 2018 2019 2020 2021 |  |

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- Definition Statute of limitations period related to income tax examinations in certain countries, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Statute of limitations period related to income tax examinations in certain countries for transfer pricing issues, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Statute of limitations period related to income tax examinations in certain countries under special circumstance in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Period of an investigation covers the assessment prior to the year of the assessment in which the investigation commences. in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Tax year that remains open to examination under enacted tax laws, in YYYY format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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