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Basis of preparation of consolidated financial statements and material accounting policy information (Tables)
 12 Months Ended
Dec. 31, 2025
Disclosure of changes in accounting policies, accounting estimates and errors [Abstract]  
Schedule of estimated useful lives of property and equipment
The estimated useful lives of property, plant and equipment for current and comparative periods are as follows:
–   Properties leased for own useOver the unexpired lease period
–   Office equipment leased for own useOver the unexpired lease period
–   Leasehold improvementsShorter period of the lease term or the useful life
–   Fixtures and furniture
3 - 5 years
–   Office and lab equipment
3 - 5 years
–   Computer equipment3 years
–   Motor vehicles
3 - 5 years
–   Manufacturing equipment
3 - 5 years
Schedule of estimated useful lives of intangible assets
The estimated useful lives for current and comparative periods are as follows:
–   Website and mobile apps2 years
–   Trademark and technology
10 - 20 years
–   Products development cost3 years
–   Computer software3 years
–   Customer relationship10 years
Website and
mobile apps
Trademark
and
technology
Computer
 software		Customer
 relationship
Total
Cost:
At January 1, 2024$1,073 $34,087 $1,582 $800 $37,542 
Additions— — 59 — 59 
Additions from acquisition (note 33(III))— — 3 — 3 
Disposals— — (2)— (2)
Written off— — (162)— (162)
Exchange differences6 1 (7)— — 
At December 31, 2024 and January 1, 20251,079 34,088 1,473 800 37,440 
Disposal of a subsidiary (note 34)— (33,935)(214)(800)(34,949)
Exchange differences(2)— 13 — 11 
At December 31, 2025$1,077 $153 $1,272 $— $2,502 
Accumulated amortization:
At January 1, 2024$1,036 $22,475 $526 $80 $24,117 
Charge for the year34 1,292 507 80 1,913 
Eliminated on disposal— — (2)— (2)
Written off— — (162)— (162)
Exchange differences6 1 (7)— — 
At December 31, 2024 and January 1, 20251,076 23,768 862 160 25,866 
Charge for the year3 595 452 37 1,087 
Eliminated on disposal of a subsidiary (note 34)— (24,210)(110)(197)(24,517)
Exchange differences(2)— 2 — — 
At December 31, 2025$1,077 $153 $1,206 $— $2,436 
Carrying amounts:
At January 1, 2024$37 $11,612 $1,056 $720 $13,425 
At December 31, 2024$3 $10,320 $611 $640 $11,574 
At December 31, 2025$— $— $66 $— $66