Recently, some media reported that China is expected to start sub rail travel in 2025. Commercial aerospace is one of the important hard science and technology tracks that Chinese enterprises have the opportunity to occupy an important place in the world, and sub orbital travel will certainly drive the new business form of China's commercial aerospace economy. According to the consulting data of Ai Media, the scale of China's commercial aerospace market has maintained a rapid growth since 2015, with an annual growth rate of more than 20% from 2017 to 2024. It is estimated that the scale of the commercial aerospace market will reach 2338.2 billion yuan in 2024. It is reported that Yang Yiqiang, the first commander in chief of the Long March 11 rocket, said recently that with the improvement of the business model, China is expected to start sub orbital travel in 2025, with a ticket price of about 2-3 million yuan. What is suborbital flight? The data shows that when the speed of the aircraft reaches the first cosmic speed of 7.9km/s, the aircraft can move around the earth at a uniform speed, which is also called orbit entry. After the spacecraft further reaches the second cosmic speed of 11.2 km/s, it can overcome the gravity and fly to other planets in the solar system. Suborbital flight tourism is non orbital space tourism. Generally, suborbital flight is at an altitude of 20-100 kilometers from the earth, and its highest point must be higher than the Kamen Line, that is, a line at an altitude of 100 km (330000 feet), which is recognized as the boundary between outer space and the earth's atmosphere. The flight above 300 km is in orbit, while the operation orbit of the International Space Station is about 400 km. Behind the not too distant space travel expectation is solid space technology support. Huang Zhicheng, a researcher who once worked at the China Aerodynamics Research and Development Center and the Beijing Institute of Systems Engineering, publicly introduced that although space tourism is still in the preparation stage for China, it has a solid foundation and great potential. China does not have any technical obstacles in terms of sub orbital tourism or earth orbit tourism. It is reported that China has used the Long March 2F rocket to launch the Shenzhou spaceship, which has been successfully recorded for 12 times; On July 16, 2021, China's suborbital reusable launch vehicle has also been successfully tested. In fact, there have been cases of space travel. In 2001, Dennis Tito, an American businessman, took the Russian "Union" TM32 manned spacecraft to the International Space Station for nine days, becoming the first space tourist in the world. In 2021, Virgin Galactic and Blue Origin have successively realized sub track tourism. On September 16, 2021, SpaceX realized the first "all civilian" space tourism, bringing four space tourists to fly around the earth 550 km from the ground for a three-day space tourism. The rapid development of the commercial aerospace industry in the new format has spawned new application fields, and also triggered people's demand for more application scenarios of commercial aerospace in the future. To this end, when the State Council Information Office released the white paper "2021 China's Aerospace" in January this year, it was mentioned that in the next five years, China's aerospace industry will "cultivate and develop space tourism and space biology"