参考答案：China's 5G commercialization has entered a countdown stage，with certification to be issued by the end of this year at the earliest, and major areas in main cities covered with 5G technology by 2020. Main areas in Beijing will be covered by 5G technology with a fixed broadband network, Gigabit LTE access capability and broadband rates down 10 percent annually by 2020, said Tan , director of the Beijing Municipal Development and Reform Commission，at a press conference on improving the business environment.

　　Shanghai also plans to complete building a smart city with both mobile communication and fixed broadband networks, obtaining Gigabit access capability and starting 5G commercialization at the end of 2020, according to the city's plan on promoting the construction of a new generation of information infrastructure between 2018 and 2020.

　　Internet Protocol version 6-based networks, intelligent transformation and new industrial internet will also achieve large-scale deployment by the same time in Shanghai as scheduled in the plan. Current progress in domestic research and development, construction and large-scale field testing of 5G technology shows the goal of starting trials for 5G commercialization in 2019 and complete commercialization of 5G in 2020 can be achieved, said Xiang, a telecom veteran.