2. Summary of significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2012

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

Property, Plant and Equipment

Land use right	Over terms of the leases
Office premises	47-50 years
Leasehold improvements	over terms of the leases or the useful lives whichever is less
Plant and machineries	5 to 10 years
Furniture, fixtures and office equipment	5 years
Motor vehicles	5 years