Visitors watch a 5G robot during the 2019 World 5G Convention in Beijing, capital of China, Nov. 21, 2019. Themed "5G changes the world, 5G creates the future," the 2019 World 5G Convention kicked off Thursday in Beijing. (Xinhua/Peng Ziyang)

People look at a 5G smartphone during the 2019 World 5G Convention in Beijing, capital of China, Nov. 21, 2019. Themed "5G changes the world, 5G creates the future," the 2019 World 5G Convention kicked off Thursday in Beijing. (Xinhua/Ren Chao)