Nanjing Zhongsheng Railway Vehicle Parts Co., Ltd. was founded in 1999, the company’s main business for railway vehicle parts manufacturing, the products cover the country’s locomotive groups and locomotive depot. Hook tail frame and other leading products account for about 20 to 30% of the national share of railway locomotive parts, ranking second in the industry. Terminal customers in China, the United States, Australia and other countries. The “alloy steel brake disc for 350KM/H high-speed train” produced by the company is the key component of the friction brake system for high-speed train, with excellent comprehensive performance, and the product manufacturing is difficult. At present, only Germany, Japan and France have mature products and technologies. The product developed by the company will fill a major gap in the field of braking technology for high-speed trains at 350 km/h in China, and its product performance can catch up with the world-renowned German Knorr Cast.