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Commitments and contingencies (Tables)
 12 Months Ended
Dec. 31, 2022
Statement [Line Items]  
Future Minimum Lease Payments
The Group does not has lease contracts that have not yet commenced as of December 31, 2022. The future lease payments for these
non-cancellable
lease contracts are as follows:
 
    
31.12.2021
     
31.12.2022
     
31.12.2022
  
    
RMB’000
     
RMB’000
     
US$’000
  
Within 1 year
      2,769        —          —    
After 1 year but within 5 years
      2,178        —          —    
After 5 years
      —          —          —    
    
 
 
     
 
 
     
 
 
  
       4,947        —          —