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Intangible assets, net (Details) - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Intangible assets, net    
Patents acquired $ 39,143,975 $ 39,143,975
Others 227,009 227,511
Total cost 39,370,984 39,371,486
Less: accumulated amortization (11,087,776) (6,564,748)
Intangible assets, net $ 28,283,208 $ 32,806,738