The latest data from the Ministry of Industry and Information Technology shows that by the end of September 2022, the total number of 5G base stations in China has reached 2.22 million, accounting for 20.7% of the total number of mobile base stations in China and more than 60% of the total number of 5G base stations in the world. The newly released white paper "China's Beidou in the New Era" pointed out that China's Beidou system has become an important new infrastructure to provide all-weather, all-time, high-precision positioning, navigation and time service for global users. Beidou has become a world-class satellite navigation system. Although the largest 5G and first-class Beidou are exciting enough. But if "5G on the ground" and "Big Dipper in the sky" hold hands, what kind of future picture will be unfolded? "A trillion market that excites the industry and makes people look forward to has pressed the start button." Deng Zhongliang, academician of the International Eurasian Academy of Sciences and professor of Beijing University of Posts and Telecommunications, summed up in an interview with China Economic Weekly: The network infrastructure that integrates heaven and earth, space and time, and communication will bring huge economic and social value to mankind, and China should also be able to take the lead in the world. 5G+Beidou is a "heaven made pair", allowing two "big powers and heavy weapons" to join hands with China to build the world's largest 4G network and 5G network successively. Compared with 4G, 5G application scenarios will be very different, but also face new challenges. For example, in the industrial Internet field, which is one of the key application directions, to build a smart mine, a smart mine, and to achieve full coverage of the highway network and railway network, it is necessary to ensure the signal coverage of shielded and semi shielded spaces such as indoor, mountain, deep valley, and the signal is not easy to be disturbed. In scenarios such as intelligent transportation and driverless driving, the communication network will be required to not only meet the communication needs, but also have high-precision spatio-temporal perception, communication and positioning. From the construction of Beidou to the application of Beidou, from China's Beidou to the world's Beidou, from the Beidou in the sky to the Beidou around us... The ability to achieve indoor precise positioning is one of the important advantages of China's Beidou over GPS and other satellite navigation systems in technology. This technological breakthrough in the "last meter" is of great significance, and will also bring many new possibilities in application scenarios and industrial development. In Deng Zhongliang's view, "5G+Beidou" can be used as a starting point to promote the deep integration of communication and navigation, so as to achieve high-precision positioning through communication. The integration of the two can meet the requirements of full coverage and high precision, enable each other and enhance each other. "5G is the ground network, and Beidou is the sky network. 5G solves the problems of high-speed data transmission and high-precision positioning in satellite sheltered areas. Beidou solves the problems of high-precision time service and high-precision positioning in open space. The integration of 5G+Beidou can not only enable each other, but also bring huge amounts of high-precision and highly timely geographic big data," said Deng Zhongliang. Ran Chengqi, director of the China Satellite Navigation System Management Office and spokesman of the Beidou Satellite Navigation System, once described 5G and Beidou as "a pair made in heaven". "5G has higher requirements for time and location, and the satellite navigation system can provide more accurate location and time information, so 5G and Beidou satellite navigation systems are naturally integrated," he said.