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Loss before taxation - Other finance costs And Staff costs (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Interest costs [abstract]      
Interest expenses on lease liabilities (notes 11(a) and 23(b)) $ 244,085 $ 205,915 $ 49,400
Interest expenses on trade financing (note 23(b)) 172,978    
Imputed interest on deferred consideration   22,235 9,513
Changes in the carrying amount of preference shares liabilities (note 25) 3,752,758 5,009,847  
Other interest expenses 28,363 33 654
Finance costs 4,198,184 5,238,030 59,567
Staff costs      
Salaries, wages and other benefits 109,644,199 76,622,503 16,019,896
Contributions to defined contribution retirement plan 861,863 562,427 219,440
Equity-settled share-based payment expenses 31,339,185 22,141,614 1,229,312
Staff costs 141,845,247 99,326,544 17,468,648
Direct costs      
Staff costs      
Staff costs 63,647,052 48,414,622 5,377,536
Selling and Distribution expenses      
Staff costs      
Staff costs 1,782,149 1,299,320 675,418
Research and Development Expenses      
Staff costs      
Staff costs 13,404,496 6,943,308 2,056,653
Administrative and other operating expenses      
Staff costs      
Staff costs $ 63,011,550 $ 42,669,294 $ 9,359,041