How many companies do high-speed rail wheels?

At present, China's domestic high-speed rail wheelsets are imported from a foreign company, which not only monopolizes the domestic high-speed rail wheel axle market, but also implements technical blockade and sells at a high price. Masteel can only produce wheels for high-speed railway trains. At present, only Masteel and Taiyuan Heavy Industry can produce high-speed railway train wheels in China. Masteel has mass-produced high-speed railway train wheels with a speed of 200 kilometers per hour.