A staff member (R) guides a visitor experience AR technology at 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)

Photo shows an unmanned warehouse at 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)

Visitors look at a 5G intelligent application booth at 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/Li Xin)

A staff member displays a Mixed Reality (MR) terminal device at 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)

A robot plays the piano at 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)

A staff member shows 5G-supported telemedicine technology 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 visit Huawei's booth 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/Li Xin)

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)