Aviation refers to the navigational activities of manned or unmanned aircraft in the Earth's atmosphere; Spaceflight refers to the navigation activities of manned or unmanned spacecraft outside the Earth's atmosphere, also known as space flight/space navigation. In order to expand social production, human beings should open up new space for activities. From the land to the sea, from the ocean to the atmosphere, and then to space, is such a process of gradually expanding the scope of human activities. Aerospace is the product of human expansion of the atmosphere and space. After more than 100 years of rapid development, aerospace has become one of the most active and influential fields of science and technology in the 21st century, and the major achievements made in this field mark the latest development of human civilization, and also represent the advanced level of science and technology of a country.