Shanghai Jia-Ao Energy Saving Doors & Windows Co., Ltd has been specialized in manufacturing aluminum doors and windows for more than 10 years. And it is an integrate enterprise of manufacturing, design and sales which covers an area of 5000 square meters.Jia-Ao has highly trained staff and modern management constitution. Every step from sourcing materials, manufacturing to testing before package are all based on the strict quality control system. That's why we have won the good reputation from all the global clients.