1968, the United States Defense Advanced Research Projects Agency established a computer network called ARPANET (abbreviation of English Advanced Research Projects Agency Network, also known as "APA"). According to CCTV's data, the new Apache network received a preparatory fund of US$ 5.2 million and a total project budget of US$ 200 million approved by Congress, which was three times that of China's foreign exchange reserves. Every cold war between the United States and the Soviet Union, the United States Department of Defense believes that if there is only one centralized military command center, once the Soviet Union is destroyed and the military command is paralyzed, then a decentralized command system design is needed. It is composed of a scattered command point. As a part of the command point, it can still work normally after other points are destroyed, but these scattered points can get in touch through some form of communication network.