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WARRANTS (Details) $ / shares in Units, ¥ in Thousands | Sep. 23, 2025 USD ($) Y $ / shares shares | Mar. 31, 2025 USD ($) Y | Mar. 30, 2025 USD ($) | Mar. 27, 2025 USD ($) Y $ / shares shares | Mar. 01, 2025 | Nov. 13, 2023 USD ($) Y $ / shares shares | Dec. 31, 2025 CNY (¥) | Dec. 31, 2024 CNY (¥) | Jul. 31, 2022 USD ($) shares | Apr. 30, 2021 USD ($) Y $ / shares shares | Feb. 28, 2021 $ / shares shares | Jan. 31, 2021 USD ($) Y | Dec. 31, 2009 $ / shares
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SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of warrants | $ | $ 2,400,000 |  |  |  |  | $ 488,881 |  |  |  |  |  |  |
Warrants forfeitable, previously granted |  |  |  |  |  |  |  |  | 51,972,960 |  |  |  |
Warrants and rights outstanding | $ |  |  |  |  |  |  |  |  | $ 92,000,000 |  |  |  |
Exercise price of warrant | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 19.5
Expiration term of warrants | 2 years |  |  |  |  |  |  |  |  |  |  |  |
Securities subject to lock up period | 6 months | 6 months |  |  | 6 months | 6 months |  |  |  |  |  |  |
Aggregate consideration of securities | $ | $ 2,000,000 |  |  |  |  | $ 12,000,000 |  |  |  |  |  |  |
Convertible notes payable |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Term of convertible note (in years) |  |  |  |  |  | 2 years |  |  |  |  |  |  |
Line of credit annual interest rate |  |  |  |  |  | 3.00% |  |  |  |  |  |  |
Principal amount |  |  |  |  |  | $ 6,000,000 | ¥ 48,152 | ¥ 43,061 |  |  |  |  |
Weighted Average Risk-free Interest Rate |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input | 0.0353 |  |  |  |  | 0.0502 |  |  |  | 0.0037 |  | 0.0018 |
Expected Life |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input | Y | 2 |  |  |  |  | 2 |  |  |  | 3 |  | 3 |
Expected Volatility |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input | 0.966 |  |  |  |  | 1.11 |  |  |  | 2.36 |  | 1.90 |
Dividend Yield |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input | 0 |  |  |  |  | 0 |  |  |  | 0 |  | 0 |
Investors |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares called by warrants |  |  |  |  |  |  |  |  |  |  | 207,891,840 |  |
Over-allotment option |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of warrants | $ |  |  |  |  |  |  |  |  |  |  |  | $ 122,000,000 |
American Depositary Shares |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares called by warrants | 471,696 |  |  |  |  | 400,000 |  |  |  |  |  |  |
Exercise price of warrant | $ / shares | $ 12.72 |  |  |  |  | $ 60 |  |  |  |  |  |  |
Expiration term of warrants |  |  |  |  |  | 2 years |  |  |  |  |  |  |
Issuance of ordinary shares (in shares) | 219,780 |  |  |  |  | 500,000 |  |  |  |  |  |  |
Aggregate price per share | $ / shares | $ 9.1 |  |  |  |  | $ 12 |  |  |  |  |  |  |
American Depositary Shares | Convertible notes payable |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price | $ / shares |  |  |  |  |  | $ 15 |  |  |  |  |  |  |
American Depositary Shares | Over-allotment option |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Expiration term of warrants |  |  |  |  |  |  |  |  |  | 3 years |  |  |
Class A ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares called by warrants | 141,508,800 |  |  |  |  | 120,000,000 |  |  |  |  |  |  |
Exercise price of warrant | $ / shares | $ 0.0424 |  |  |  |  |  |  |  |  |  |  |  |
Issuance of ordinary shares (in shares) | 65,934,000 |  |  |  |  | 150,000,000 |  |  |  |  |  |  |
Class A ordinary shares | Convertible notes payable |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion price | $ / shares |  |  |  |  |  | $ 15 |  |  |  |  |  |  |
Class A ordinary shares | Investors |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued |  |  |  |  |  |  |  |  |  |  | 8,108,100 |  |
Class A ordinary shares | Investors | Tranche I-III |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Share price | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.1233 |  |
Class A ordinary shares | Investors | Tranche IV |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Share price | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.2667 |  |
Time Frames of 6 months |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of warrants | $ |  |  |  |  |  |  |  |  |  |  |  | 100,000,000 |
Time Frames of 12 months |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of warrants | $ |  |  |  |  |  |  |  |  |  |  |  | 300,000,000 |
Time Frames of 24 months |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of warrants | $ |  |  |  |  |  |  |  |  |  |  |  | 500,000,000 |
Time Frames of 36 months |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of warrants | $ |  |  |  |  |  |  |  |  |  |  |  | $ 1,000,000,000 |
First warrant |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of warrants | $ |  |  |  | $ 2,800,000 |  |  |  |  |  |  |  |  |
Aggregate consideration of securities | $ |  |  |  | $ 4,960,000 |  |  |  |  |  |  |  |  |
First warrant | Weighted Average Risk-free Interest Rate |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input |  |  |  | 0.0373 |  |  |  |  |  |  |  |  |
First warrant | Expected Life |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input | Y |  |  |  | 2 |  |  |  |  |  |  |  |  |
First warrant | Expected Volatility |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input |  |  |  | 1.937 |  |  |  |  |  |  |  |  |
First warrant | Dividend Yield |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input |  |  |  | 0 |  |  |  |  |  |  |  |  |
First warrant | American Depositary Shares |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares called by warrants |  |  |  | 300,000 |  |  |  |  |  |  |  |  |
Exercise price of warrant | $ / shares |  |  |  | $ 60 |  |  |  |  |  |  |  |  |
Expiration term of warrants |  |  |  | 2 years |  |  |  |  |  |  |  |  |
Issuance of ordinary shares (in shares) |  |  |  | 390,000 |  |  |  |  |  |  |  |  |
Aggregate price per share | $ / shares |  |  |  | $ 12.72 |  |  |  |  |  |  |  |  |
First warrant | Class A ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares called by warrants |  |  |  | 90,000,000 |  |  |  |  |  |  |  |  |
Exercise price of warrant | $ / shares |  |  |  | $ 0.2 |  |  |  |  |  |  |  |  |
Issuance of ordinary shares (in shares) |  |  |  | 117,000,000 |  |  |  |  |  |  |  |  |
Second warrant |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of warrants | $ |  |  |  | $ 4,500,000 |  |  |  |  |  |  |  |  |
Expiration term of warrants |  |  |  | 2 years |  |  |  |  |  |  |  |  |
Aggregate consideration of securities | $ |  |  | $ 2,000,000 |  |  |  |  |  |  |  |  |  |
Second warrant | Weighted Average Risk-free Interest Rate |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input |  |  |  | 0.0397 |  |  |  |  |  |  |  |  |
Second warrant | Expected Life |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input | Y |  |  |  | 2 |  |  |  |  |  |  |  |  |
Second warrant | Expected Volatility |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input |  |  |  | 1.9278 |  |  |  |  |  |  |  |  |
Second warrant | Dividend Yield |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input |  |  |  | 0 |  |  |  |  |  |  |  |  |
Second warrant | American Depositary Shares |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares called by warrants |  |  |  | 471,696 |  |  |  |  |  |  |  |  |
Exercise price of warrant | $ / shares |  |  |  | $ 12.72 |  |  |  |  |  |  |  |  |
Issuance of ordinary shares (in shares) |  |  |  | 157,232 |  |  |  |  |  |  |  |  |
Aggregate price per share | $ / shares |  |  |  | $ 12.72 |  |  |  |  |  |  |  |  |
Second warrant | Class A ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares called by warrants |  |  |  | 141,508,800 |  |  |  |  |  |  |  |  |
Exercise price of warrant | $ / shares |  |  |  | $ 0.0424 |  |  |  |  |  |  |  |  |
Issuance of ordinary shares (in shares) |  |  |  | 47,169,600 |  |  |  |  |  |  |  |  |
Third warrant |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of warrants | $ |  | $ 2,200,000 |  |  |  |  |  |  |  |  |  |  |
Aggregate consideration of securities | $ |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |
Third warrant | Weighted Average Risk-free Interest Rate |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input |  | 0.0397 |  |  |  |  |  |  |  |  |  |  |
Third warrant | Expected Life |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input | Y |  | 2 |  |  |  |  |  |  |  |  |  |  |
Third warrant | Expected Volatility |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input |  | 1.9278 |  |  |  |  |  |  |  |  |  |  |
Third warrant | Dividend Yield |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants, measurement input |  | 0 |  |  |  |  |  |  |  |  |  |  |
Third warrant | American Depositary Shares |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares called by warrants |  |  |  | 235,848 |  |  |  |  |  |  |  |  |
Exercise price of warrant | $ / shares |  |  |  | $ 12.72 |  |  |  |  |  |  |  |  |
Expiration term of warrants |  |  |  | 2 years |  |  |  |  |  |  |  |  |
Issuance of ordinary shares (in shares) |  |  |  | 78,616 |  |  |  |  |  |  |  |  |
Aggregate price per share | $ / shares |  |  |  | $ 12.72 |  |  |  |  |  |  |  |  |
Third warrant | Class A ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares called by warrants |  |  |  | 70,754,400 |  |  |  |  |  |  |  |  |
Exercise price of warrant | $ / shares |  |  |  | $ 0.0424 |  |  |  |  |  |  |  |  |
Issuance of ordinary shares (in shares) |  |  |  | 23,584,800 |  |  |  |  |  |  |  |  |
Maxim Groups LLC | Over-allotment option |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of warrants | $ |  |  |  |  |  |  |  |  |  | $ 94,000,000 |  |  |
Maxim Groups LLC | American Depositary Shares |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued |  |  |  |  |  |  |  |  |  | 3,765,100 |  |  |
Share price | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.75 |  |  |
Number of shares called by warrants |  |  |  |  |  |  |  |  |  | 2,823,825 |  |  |
Maxim Groups LLC | American Depositary Shares | Over-allotment option |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued |  |  |  |  |  |  |  |  |  | 564,760 |  |  |
Number of shares called by warrants |  |  |  |  |  |  |  |  |  | 423,570 |  |  |
Maxim Groups LLC | Class A ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued |  |  |  |  |  |  |  |  |  | 112,953,000 |  |  |
Maxim Groups LLC | Class A ordinary shares | Over-allotment option |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants issued |  |  |  |  |  |  |  |  |  | 16,942,800 |  |  |
Maxim Groups LLC | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of warrant | $ / shares |  |  |  |  |  |  |  |  |  | $ 36 |  |  |
Maxim Groups LLC | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
SHAREHOLDER RIGHTS PLAN |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of warrant | $ / shares |  |  |  |  |  |  |  |  |  | $ 33.2 |  |  |

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