Both high-speed rail and bullet train run on standard rails, which mainly solve the traffic problems between cities. There is no difference in appearance between bullet trains and high-speed trains, but the actual driving force is different. High-speed rail runs at high speed, so it needs much higher power and control means. The maglev train now has only one commercial line in Shanghai, which belongs to intercity transportation. Its characteristic is that it needs to run at a high speed in a special orbit. Light rail is a kind of urban rail transit. Compared with the subway, most of them run on overhead special tracks. It belongs to the same category as the subway.

First of all, the high-speed rail is a class, the light rail is a class, and the magnetic levitation is a class. In China, bullet trains refer to railway lines and related equipment with a speed of 200 kilometers per hour. High-speed rail refers to railway lines and related equipment and equipment with a speed of 300 kilometers per hour. Compared with the subway, light rail is a kind of rail transit with less traffic volume in urban rail transit. However, most of the subway and light rail are merged into "XX Line of Urban Rail Transit". Magnetic levitation is a technical measure to keep an object in a certain position along one axis or several axes by using magnetic field force. The maglev train is suspended in mid-air, so it has no wheels, so it has no friction between wheels and rails. It consumes little power to run, and it can run at a high speed if it wants. In normal commercial operation, the average speed of maglev is much higher than that of wheel-rail high-speed rail, but it is slightly better than wheel-rail (574.8km/h) (57 1km/h) if the highest speed is compared. However, the maglev technology is not fully mature, and there are no other commercial routes except Shanghai for the time being. China's urban rail transit system refers to all kinds of urban rail transit systems located in China or between cities and suburbs, mainly driven by electricity, including subway, light rail, monorail, tram and maglev, and sometimes bus rapid transit. Baidu Encyclopedia: China City

Maglev train: It is a kind of train driven by magnetic levitation force (i.e. 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 speed of maglev train can reach more than 400 kilometers per hour, which is faster than the 380-kilometer wheel-rail high-speed rail. 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. The first maglev train in China started running in Shanghai in June 2003. EMU: EMU generally refers to a kind of rail vehicle with its own power and carrying operating load. However, in modern centralized EMUs, EMUs are closer to the locomotive role in traditional trains, and generally do not carry operating load. In China, trains with a speed of more than 250 kilometers per hour are called "bullet trains". High-speed Railway: According to the Regulations on Railway Safety Management implemented on New Year's Day in 20 14, high-speed railway refers to the railway passenger dedicated line with a design speed of more than 250 kilometers per hour (including reservation) and an initial operation speed of more than 200 kilometers per hour. In China, high-speed trains and bullet trains overlap or overlap to some extent. But in fact, high-speed trains generally run on special high-speed railways, and many bullet trains also run on ordinary railways, but the speed is much lower. Shanghai Pudong International Airport has only one maglev.

1. Maglev trains with different working principles are vehicles that use electromagnetic force to suspend the car body on the track and drive the vehicle through electromagnetic force. High-speed railway is a kind of vehicle with wheel-rail system. It builds passenger dedicated lines and runs EMUs on them. 2. The biggest feature of maglev trains with different running speeds is that there is no friction resistance that cannot be eliminated by wheel-rail system, only air resistance, and the running speed can exceed 400km/h or even reach 600 km/h. The highest running speed of high-speed railway is 48 1.2km/h, and the test speed is 574.8 km/h. The project cost is different. Shanghai Maglev Line is 29.863 km long, with a cost of 8.9 billion RMB and a unit price of 298 million/km. The cost of high-speed rail is about1.300 million/km. The working principle of maglev train has been expanded. Based on the principle of "like-sex repulsion and opposite-sex attraction", the maglev train makes the magnet have the ability of defying gravity, which makes the car body completely off the track, suspended at a distance of about 1 cm from the track, and flew in the air, creating a miracle of space flight with almost zero height. The repulsive force levitated the train. The power of conventional locomotive comes from the front, and the power of maglev train comes from the track. Coils are installed on both sides of the track. Alternating current turns the coil into an electromagnet, which interacts with the magnet on the train. When the train is running, the magnet (N pole) at the front of the train is attracted by the electromagnet (S pole) at the front of the track and repelled by the electromagnet (N pole) at the back of the track. In this way, the front is pulled and the back is pushed, making the train move forward. Baidu Encyclopedia-Reference Source of Maglev Train

The difference between bullet train and ordinary train is that each car of bullet train has a power system, and the front is the main control; Only one front of the ordinary train has electricity, and the trains behind it have been towed away! Both light rail and subway belong to the category of urban rail transit. The fundamental difference is that the design traffic volume of subway is greater than that of light rail! High-speed rail is a name different from ordinary railway. Compared with ordinary railways, it has high speed and high design requirements. Therefore, the high-speed rail is elevated even if it is not in the city to meet the high design requirements! Maglev train is a kind of high-speed train, which is completely different from other kinds of design ideas. It makes the train drift off the track through the repulsion of magnetic field, thus driving at high speed.