Super high-speed rail is closely related to the travel of Volkswagen. The most attractive thing is that it runs much faster than wheel-rail high-speed trains, with speeds of 600 to 1200 kilometers per hour, and many people even assert that they can reach more than 4,000 kilometers. A common feature of this type of high-speed rail is that the train must run in a closed vacuum or low-pressure pipeline. Specifically, it is to extract air to reach a low-pressure environment close to a vacuum, and adopt pneumatic or magnetic levitation drive technology to make the train Ultra-high-speed operation in all-weather, wheel-rail resistance, low air resistance and low noise modes. If the following items are true, the most questionable possibility of the realization of the super high-speed rail is:. ['Super high-speed rail cannot achieve sealing of low-pressure pipelines in some lines.', 'Equipment maintenance will be extremely difficult and expensive in the ultra-high-speed rail-operated vacuum pipeline.', 'Certain necessary equipment of the super high-speed rail in vacuum or low-pressure pipelines will not be available.', 'Once the high-speed rail is out of control, it will have terrible consequences for the personal safety of passengers.']