Professional One-Stop Shopping Contract Manufacturing Service Manufacturer .Topscom is a leading Electronic Manufacturing Services (EMS) provider in China. We are a mainland company,established in the year 1995. Our Headquarter is in HK and our factory is located in Shenzhen, with the effort for more than 20 years, we are proud of our fast development.Now we have about 1200 employees in China.Topscom provides customers with design,engineering, and manufacturing resources that are vertically integrated with components to optimize their operations by lowering their costs and reducing their time to market.