Diagram of "Super High Speed Rail". At the end of last year, the main project of the first phase of the Shanxi Datong (Yanggao) Test Line, China's first ultra high speed and low vacuum pipeline maglev transportation system test line with fully independent intellectual property rights, was completed. The total length of this line is 2 kilometers, making it the longest and largest full-scale high-speed flight train test line under construction in the world. High speed flying trains, abbreviated as "high-speed trains" or "super high-speed trains". The reason why it is named a high-speed flying train is because its speed during operation has exceeded people's imagination, as if it is "flying" on a track. It is understood that after being put into operation, the operating speed of high-speed trains will reach 1000 kilometers per hour, which is twice the current speed of the fastest train in the world. So, why is the speed of high-speed cars so fast? What kind of wave will it set off in the transportation field in the future? Today, let's focus on the dual empowerment of "maglev" and "vacuum", which helps high-speed trains travel thousands of miles a day. It's like a bean gun with an ultra long barrel, a series of passenger cars in the pipeline moving forward under strong airflow... In 1888, French writer Jules Verne imagined a transportation vehicle that uses high-pressure airflow to propel trains through steel pipelines in his science fiction novel "The Express of the Future". According to Verne's bold imagination, this pipeline, over 4800 kilometers long, is wrapped in three layers of iron mesh and coated with resin on its outer surface to protect it from seawater activity, connecting Europe and North America. Under the strong airflow, the speed of trains inside the pipeline can reach up to 1800 kilometers per hour. In 1904, Robert Goddard, the father of modern rocket technology, proposed the concept of "vacuum pipeline transportation", which was the first modern vacuum pipeline system. According to his idea, the train can slide in a pipeline that maintains a vacuum state. When the train is running, high-pressure and high-temperature liquid is sprayed onto the wheels using a nozzle. After the liquid is sprayed out, it will become high-pressure steam, and the train is suspended on the track by the pressure of the fluid. Dreams reflect reality. The reason why humans have these ideas ultimately stems from their pursuit and desire for faster train speeds. Generally speaking, the friction between the wheels and the track, as well as the air resistance experienced by the train during operation, are the main reasons why ordinary trains cannot drive fast. Since the advent of trains, people have been making every effort to reduce friction and resistance: designing the front of the train into a streamlined shape, using lightweight materials to manufacture the train... However, these measures were unable to solve the problem from the root, until the emergence of magnetic levitation technology. Magnetic levitation technology utilizes the diamagnetism between magnets to achieve the effect of suspending objects in the air through the principle of repulsion between homonymous magnetic poles and attraction between heteronymous magnetic poles. After the technology is applied to the train, the strong magnetic field generates a repulsive force between the superconductor and the guide rail that is enough to make the train "float", avoiding contact between the train and the track, eliminating frictional resistance during operation, and achieving high-speed "ground close flight" of the train. Based on this advantage, many countries have increased their research and development efforts in maglev trains, and maglev technology has naturally become one of the key core technologies for high-speed trains. At the same time, in order to achieve