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Taxes (Details 1)		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
China statutory income tax rate		25.00%	25.00%	25.00%
Preferential tax rate reduction		(12.10%)	(8.80%)	(7.60%)
Change in valuation allowance		9.00%	0.40%	0.50%
Permanent difference	[1]	2.80%	0.10%	0.10%
Effective tax rate		24.70%	16.70%	18.00%
[1] Permanent difference mainly consisted of the meal and entertainment expenses which is partially non-deductible under PRC income tax law.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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