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v3.20.1

Summary of significant accounting policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Property, plant and equipment |
Office premises | 47 to 51 years
Leasehold improvements whichever is less | over terms of the leases or the useful lives
Furniture, fixtures and office equipment | 3 to 5 years
Motor vehicles | 4 years
Testing equipment | 3 years
Engineering segment backlog |
| 2019 |  | 2018
| US $'000 |  | US $'000
Engineering segment | $ | 8,611 |  |  | $ | 4,303 |
ZHEJIANG TIANLAN |
Property, plant and equipment |
Land use right | Over terms of the leases
Buildings and leasehold improvements | 11 to 50 years, with 5% residual value
Plant and machineries | 5 to 10 years, with 5% residual value
Furniture, fixtures and office equipment | 5 years, with 5% residual value
Motor vehicles | 5 years, with 5% residual value

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