On August 16, 2016 (July 14, 2016 lunar calendar), our country launched the world's first quantum science experimental satellite "Mozi". At 01:40 on August 16, 2016, our country successfully launched the world's first quantum science experimental satellite ("Quantum Satellite") "Mozi" with a Long March 2D carrier rocket at Jiuquan Satellite Launch Center. The complete success of this launch mission marks that China's aerospace technology has entered a new stage again. The outside world has paid very high attention to the launch of China's quantum satellite. This quantum communications satellite is named after the ancient Chinese philosopher Mozi. What is a quantum satellite? Simply put, it is a communication satellite. It is reported that the launch of China's quantum satellite will enable China to take the lead in realizing high-speed satellite-to-ground quantum communication in the world, connecting the ground-based optical fiber quantum communication network, and initially building a quantum communication network. In recent years, China's quantum satellite has been regarded as a supporting research for the next generation of communication and computer technology due to its high transmission efficiency and absolute security. Due to the indivisible nature of quantum and the unclonable state, using it as an information carrier can achieve key distribution against any eavesdropping, thereby ensuring the absolute security of the transmission content. Quantum satellite communication, which is the core research content, has also become the frontier and focus area of global physics research. China's quantum satellite military communication is no longer afraid of being eavesdropped. What the military field requires is a secret. After the electromagnetic wave is discovered, people use electromagnetic waves to transmit information, even with encrypted codes, it is easy to be eavesdropped. The launch of China's quantum technology satellite, the successful application of technology will be first used in the military and national security fields. Scientists have lowered the "volume" generated by the information transmission to the level of a photon, and any eavesdropper who actively measures and monitors will be the first to be discovered. The information is weak to the limit - the quantum level, no matter how carefully read it, it will completely change it, and it is impossible to change it just a little bit. Fu Yipeng, a military commentator on China's quantum satellite, pointed out that if the telegraph, satellite phone and other communication systems we use now are very advanced, then the next step China will use quantum communication for encryption processing, and all kinds of confidential information have been defined as "unconditional security" communication methods. The ability to ensure that military intelligence is not deciphered after encryption solves the problem of ensuring information security and even protecting personal privacy from the source. Pan Jianwei, chief scientist of China's quantum science experimental satellite, said that once the absolutely secure communication is realized in theory, the government, the military and banks, and even the whole society will benefit. (Pan Jianwei, Chief Scientist of China's Quantum Communication Research Experiment) Many countries want to share technology with China. Science and technology are also going global along with economic globalization. After China successfully developed the world's first quantum communications satellite, it did not adopt a unilateral "technology monopoly" like developed countries such as the United States and Europe, but welcomed global cooperation with an open attitude. Previously, Austria and other countries wanted to cooperate with China's quantum communication technology and proposed to establish communication experiments from Beijing to Vienna and other cities. China agreed very readily. Pan Jianwei, chief scientist of China's quantum satellite China Quantum Communication, made clear China's attitude to the world, "China has decided to open the relevant data of the payload to the world." Then Germany and Italy also joined China's quantum communication experiment and cooperated with China in exploring the construction of a global quantum communication network and the construction of a "quantum constellation". Some foreign comments have pointed out that China's comprehensive opening-up practice proves that China is a world power. After China took the lead in the high-tech field, it did not adopt a technology monopoly approach to let the world see the image of a truly rising power. The launch of China Quantum Satellite Quantum Satellite is one of the first batch of scientific experimental satellites of the Chinese Academy of Sciences' space science pilot special project. Its main scientific goal is to use the satellite platform to conduct high-speed quantum key distribution experiments on satellite and ground, and on this basis to conduct wide-area quantum key network experiments, in order to make a major breakthrough in the practical application of space quantum communication; to carry out quantum entanglement distribution and quantum teleportation experiments at the spatial scale, and to carry out experimental research on the completeness of space-scale quantum mechanics. Quantum satellite engineering is in charge of the National Space Science Center of the Chinese Academy of Sciences. The University of Science and Technology of China is responsible for the proposal of scientific goals and the development of scientific application systems; the Chinese Academy of Sciences Shanghai Microsatellite Innovation Research Institute (Shanghai Microsatellite Engineering Center) focuses on the development of satellite systems, and the Chinese Academy of Sciences Shanghai Institute of Technical Physics jointly develops payload subsystems with the University of Science and Technology of China; the National Space Science Center of the Chinese Academy of Sciences takes the lead in the development, construction and operation of ground support systems, and the Earth Observation and Digital Earth Science Center and other units participate. Our country's independently developed quantum satellite has broken through a series of high and new technologies, including high-precision star-to-ground optical path alignment aimed at two ground stations at the same time, satellite-to-ground polarization state preservation and basis vector correction, spaceborne quantum entanglement source and other key engineering-grade technologies. The design life of the satellite is two years. The successful launch and on-orbit operation of the quantum satellite will help our country maintain and expand its international leading position in the overall level of practical application of quantum communication technology, and realize the leap-forward improvement of national information security and information technology level. It is expected to promote our country's scientists to make major breakthroughs in the frontier field of quantum science, which is of great significance for promoting the sustainable development of our country's space science satellite series. The mission also carried the thin atmospheric science experiment satellite developed by the Chinese Academy of Sciences and the Spanish science experiment small satellite. The Long March 2D launch vehicle was developed by the Shanghai Academy of Aerospace Technology, a subsidiary of the China Aerospace Science and Technology Group company. The launch is the 234th flight of the Long March series of launch vehicles.