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Taxes (Details 1)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Continuing Operations [Member]
Effective Income Tax Rate Reconciliation [Line Items]
China statutory income tax rate	25.00%
Preferential tax rate reduction	(19.30%)
200% deduction on research and development expenses	(1.00%)
Change in valuation allowance	(4.00%)
Permanent difference	(12.60%)
Others	6.10%
Effective tax rate	(5.80%)
Discontinued Operations [Member]
Effective Income Tax Rate Reconciliation [Line Items]
China statutory income tax rate		25.00%	25.00%
Preferential tax rate reduction		(9.60%)	(8.40%)
200% deduction on research and development expenses
Tax rate difference outside of PRC			(3.40%)
Change in valuation allowance		(15.30%)	(12.60%)
Permanent difference		(0.10%)	(0.10%)
Effective tax rate			0.50%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations attributable to deduction. Includes, but is not limited to, dividend deduction, deduction for dividend paid to employee stock ownership plan (ESOP), Medicare prescription drug benefit subsidy deduction, and other deductions.

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