Changtong Doors Group is composed of Weifang Changtong Stainless steel Products Co., Ltd., Weifang Changtong Intelligent Equipments Co., Ltd., Tianjin Shuangxing Automatic Door Co., Ltd. and Ward Mechanical Electronics Co., Ltd. Our company is an excellent high sci-tech corporation mainly specializing in research, development, designing, manufacture and sale of intelligent integration products. Our company possesses high qualified talents, strong marketing network and improved service system. It mainly produces SDM series stainless steel, high alloy automatic expansion door, rotary door and intelligent road gate. Products are controlled by micorcomputer control and is a kind of universal products integrating electric-power, hand-power, remote control, climb resistance, alarm and barrier stop. Expansion door and rotary door possesses particular original appearance designing, improved reasonable interior structure, smooth running and well-wear. Products are sold well all over our country. Expansion door was awarded many state patent and was awarded the title of state consumers recognized quality pro ducts. It ranked in the top in similiar products at home and abroad. Changtong products are absolutely ideal products of consumers.
　　Our company insists on the tenet of high credit and consumers foremost. With high quality, high standard, advanced grade and strict requirement's policy, we will produce first-class products and served society. All staff warmly welcomes all fields of friends to visit our company and negotiate trade.