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SHORT-TERM BORROWINGS - Due to third party (Details) | 12 Months Ended |
--- | --- | ---
Jun. 30, 2021 CNY (¥) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($)
Short-term Debt [Line Items] |  |  |
Total short-term borrowings due to third party | ¥ 530,000 | ¥ 260,000 | $ 40,871
Interest 15 annual interest due on September 23, 2021 |  |  |
Short-term Debt [Line Items] |  |  |
Total short-term borrowings due to third party | ¥ 230,000 |  |
Debt Instrument, Interest Rate During Period | 15.00% |  |
Interest-free, due on May 12, 2022 |  |  |
Short-term Debt [Line Items] |  |  |
Total short-term borrowings due to third party | ¥ 200,000 |  |
Interest-free, due on June 21, 2022 |  |  |
Short-term Debt [Line Items] |  |  |
Total short-term borrowings due to third party | 100,000 |  |
Interest-free due On September 19, 2022 |  |  |
Short-term Debt [Line Items] |  |  |
Total short-term borrowings due to third party | ¥ 0 | ¥ 260,000 | $ 40,871

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