Beijing Yan Hong Da Railway Equipment Co., Ltd., founded in 2001, is a high-tech enterprise specialized in maintenance machinery and equipment and measuring instruments research and production for railway and urban rail transit. Its headquarter is located in Zhongguancun Science Park, Fengtai district, Beijing. Its production plant is located in Changzhou, Jiansu province, which is the mechanical manufacturer center of China, has 25 Germany-made Korea-made CNC machining center with the production workshop area of 34,000 square meters, and further has 40 CNC lathes, milling machines and grinding machines. 3 assembly production lines and detection devices such as three-coordinate measuring instruments, hardness tester and simulator stand are provided. The fixed assets total RMB 120,000,000.