Shanghai Longzhuo Sign System Co., Ltd.  

Shanghai longzhuo is a manufacturer of construction material, our main product is windows and doors. We are specialized in the line of retractable window screen, PVCu or UPVC windows and doors, aluminum windows and doors, awning, conservatory etc. We introduced the most advanced technology and equipment, and also pay strictly inspection on quality, Which we regard as the life of our company. [More Details...]