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Discontinued operations - (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Discontinued Operations and Disposal Groups [Abstract] |  |  |
REVENUES |  | $ 2,589,823 | $ 5,505,734
COST OF REVENUES |  | 1,603,887 | 3,527,402
GROSS PROFIT |  | 985,936 | 1,978,332
Selling |  | 607,424 | 3,368,714
General and administrative |  | 954,576 | 6,142,730
Research and development |  | 922,343 | 3,323,361
Long-live assets impairment |  | 2,602,589 | 2,631,019
Total operating expenses |  | 5,086,932 | 15,465,824
LOSS FROM OPERATIONS |  | (4,100,996) | (13,487,492)
Interest income |  | 1,296 | 2,994
Interest expense |  | (33,682) | (1,450,707)
Other (expense) income, net |  | (154,275) | 1,206,793
Total other income (expense), net |  | (186,661) | (240,920)
LOSS FROM DISCONTINUED OPERATIONS BEFORE INCOME TAXES |  | (4,287,657) | (13,728,412)
GAIN ON THE SALE OF DISCONTINUED OPERATIONS BEFORE INCOME TAXES |  | 22,858,286 |
TOTAL INCOME(LOSS) FROM DISCONTINUED OPERATIONS BEFORE INCOME TAXES |  | 18,570,629 | (13,728,412)
INCOME TAX EXPENSE(BENEFIT) |  |  | (77,649)
INCOME(LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAX |  | $ 18,570,629 | $ (13,650,763)

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