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v3.19.1

Summary of significant accounting policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Property, plant and equipment |
Office premises | 47 to 51 years
Leasehold improvements | over terms of the leases or the useful lives whichever is less
Furniture, fixtures and office equipment | 3 to 5 years
Motor vehicles | 4 years
Testing equipment | 3 years
ZHEJIANG TIANLAN |
Property, plant and equipment |
Land use right |  | Over terms of the leases
Office premises |  | 47-50 years, with 5% residual value
Leasehold improvements |  | over terms of the leases or the useful lives whichever is less, with 5% residual value
Plant and machineries |  | 5 to 10 years, with 5% residual value
Furniture, fixtures and office equipment |  | 3 to 5 years, with 5% residual value
Motor vehicles |  | 1 to 8 years, with 5% residual value

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