In 2020，the construction of China’s broadband mobile network was keeping a steady growth，and China has built the largest 4G and 5G network in the world. In the meanwhile，the mobile traffic flow in China was growing rapidly. 5G applications were widely used in the world，and the 5G application developed fast in China and laid a solid foundation. In 2021，the construction of 5G network in China will be continuing promoted，and the high-quality network will continue to stimulate the 5G connections and traffic demand to maintain high-speed growth，and enable the digital transformation of the industry to support stable economic growth. The research on next generation mobile communication technology will be carried out gradually.