It covers links such as railway planning, construction, operation, and equipment manufacturing, including business forms like ordinary-speed railways and high-speed railways. As the backbone of comprehensive transportation, it undertakes large-scale passenger and freight transportation tasks. With advantages such as large transportation capacity and high punctuality rate, it promotes regional interconnection and economic coordinated development. It continuously promotes technological innovation, such as intelligent dispatching and the research and development of high-speed maglev, expanding service boundaries and transportation efficiency.