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LONG-TERM INVESTMENTS - Components of long-term investments (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
LONG-TERM INVESTMENTS |  |  |
Share of equity loss | $ 79,307 | $ 48,047 |
Equity investment without readily determinable fair value measured at measurement alternative | 2,609,331 |  | $ 2,560,822
Equity investment accounted for using the equity method | 4,011,647 |  | 4,015,866
long-term investments | $ 6,620,978 |  | $ 6,576,688

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