What is a maglev train?

Maglev train is a new type of train that suspends the train on the track by electromagnetic attraction or repulsion. When the train is running, a gap of 10-20cm can be maintained between the car body and the track. Because there is no mechanical contact and friction between the car body and the track, the speed can reach more than 500 kilometers per hour, there is no vibration, noise and pollution, and the ride is stable. Comfortable and safe, just like an airplane flying at low altitude, is an ideal means of transportation, which was called "Shen Xing Pacific Insurance" in the 2nd/kloc-0th century.