Beijing Dingchang Composite Material Co., Ltd. is a high-tech enterprise in designing, producing and selling composite material products. The company was established in 1996. By the end of 2024, the mileage of subway evacuation platform products is about 2500 kilometers, and the mileage of subway contact rail protection system is about 4000 kilometers. Now Dingchang has developed into a specialized and new small giant enterprise with Beijing as the enterprise headquarters, Shandong, Chizhou, Chongqing and other production bases, with RTM, SMC, pull squeeze, RPC and other production process equipment.