Segment information and revenue analysis (Details 2) - USD ($)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Total revenues	$ 8,706,740	$ 1,437,848	$ 280,000
Mainland China [Member]
Total revenues	8,706,740	1,417,848	2,589,823
Outside Mainland China [Member]
Total revenues		20,000	280,000
Total Revenues [Member]
Total revenues	$ 8,706,740	$ 1,437,848	$ 2,869,823

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details