Maglev train is a kind of train driven by magnetic levitation force (magnetic attraction and repulsion). It is suspended in the air because of the magnetic force of the orbit. Unlike other trains, it needs to touch the ground when walking, so it is only resisted by the air. The research of magnetic levitation technology originated in Germany. As early as 1922, German engineer Herman Qiangsuo put forward the principle of electromagnetic levitation, and applied for the patent of maglev train in 1934.
After 1970, with the continuous strengthening of the economic strength of the industrialized countries in the world, in order to improve the transportation capacity to meet the needs of their own economic development, Germany, Japan and other developed countries and China have begun to plan and develop magnetic levitation transportation systems. ? China: China's first maglev train (purchased from German) started operation in Shanghai in June 2003. 20 15- 10 Changsha maglev line, the first maglev line in China, was successfully put into trial operation? .