Chang Tong Technology Co., Ltd was established in September 2003, located in Gongyi Industrial Demonstration Zone. The company covers an area of 16081.3m2; with total investment of 260 million RMB. The main business scopes are design; research; produce and sell the rolled section and auto parts; export and import products and technology. It mainly manufactures leaf spring, rolled section and flat steel, automotive brake, flange and pipe piling end-plates.