A: Since 1956, China has made remarkable achievements in space technology by relying on its own strength, and successfully developed and launched 15, nearly 50 artificial earth satellites and 3 experimental spacecraft. In the field of space transportation, we have developed a comprehensive space transportation system, including disposable launch vehicles, orbit transfer vehicles and reusable space transportation systems. Among them, the "Long March" series of launch vehicles 12 have the carrying capacity to launch various orbital payloads such as near-earth orbit, sun-synchronous orbit and geosynchronous transfer orbit. Up to now, the "Long March" series of launch vehicles have carried out 68 launches; Among them, it successfully launched 22 times and sent 27 foreign-made satellites into space. From 1996 to 10, the "Long March" series of launch vehicles have been successfully launched for 26 consecutive times. The future development trend of China's space technology will reflect the following characteristics: (1) Various series of launch vehicles in service will be continuously improved to develop a new generation of launch vehicles. Many major national science and technology projects of China's aerospace industry, a considerable part of the tasks are completed by the active Long March series of launch vehicles. Before the new series of launch vehicles are put into use, the service life of active launch vehicles is at least 20 years. Therefore, we should constantly improve the active launch vehicle, improve its reliability and mission adaptability, and broaden its mission adaptability to meet the needs of high-density launch missions at home and abroad in the near future. The development of a new generation of launch vehicles will be an upgraded product of the Long March series of launch vehicles, aiming at comprehensively improving the overall level and capability of China's launch vehicles and maintaining the position of China's launch technology in the world space field. The new generation launch vehicle adopts non-toxic and pollution-free propellant, adopts advanced technologies such as large-diameter structure and large-thrust engine, and its carrying capacity is greatly improved. The maximum carrying capacity of low orbit reaches 20t, and that of GTO reaches 10t. Realizing the "three-oriented" design of the model has the advantages of low cost, high reliability and convenient test operation. (2) The new concept aircraft is expected to develop. The future space launch technology will show the trend of integration of missile and launch technology, satellite and launch technology, aviation and space technology. Especially unmanned aerial vehicles, space exploration vehicles and manned spacecraft, will develop rapidly in the next 20-30 years. (3) Manned space flight will develop towards civilian use. For more than half a century, manned space flight has developed rapidly, and now it has begun to develop into the commercial field. It is possible to achieve greater development in the civilian direction in the future because: first, the technology is maturing and the cost is falling; The second is to provide greater support for the sustainable development of aerospace.