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Other investments (Tables)
 12 Months Ended
Dec. 31, 2024
Other investments [Abstract]  
Other investments The Group has elected to designate these other investments at FVOCI. The fair value of the Group’s investments in equity instruments are as follows:

​
  
 2024
US$’000
    
2023
US$’000
    
2022
US$’000
  
Investment in ZeroNorth A/S (formerly known as Alpha Ori Technology Holdings Pte Ltd “Alpha Ori”)
    
2,344
      
3,428
      
3,269
  
Investment in Diginex Solutions (HK) Limited (“Diginex”)     525       525       501  
Investment in Clean Hydrogen Works, LA-1, LLC (“CHW-LA1”)     20,000       20,000       55  
Investment in Vanguard Tech, Inc. (“Vanguard”)     200       -       -  
      23,069       23,953       3,825