??Shanghai Green-light Electric Bicycle Co. Ltd is a private enterprise with modern enterprise management system. It occupies a land of 25,000 square meters with a constructing area of 30,000 square meters. Nowadays, it owns numbers of assembly lines for producing, so it has the ability to produce 300,000 electric bicycles a year. It gets many national patents and it is also one of the few hi-tech enterprises in the field of electric bicycles.