Photo taken on Nov. 20, 2019 shows Huawei's exhibition booth during a press preview for the 2019 World 5G Convention in Beijing, capital of China. The 2019 World 5G Convention will open here on Nov. 21. (Photos: Xinhua)

A 5G-powered urban security system is on display during a press preview for the 2019 World 5G Convention in Beijing, capital of China, Nov. 20, 2019. The 2019 World 5G Convention will open here on Nov. 21.

A visitor looks at an indoor delivery robot during a press preview for the 2019 World 5G Convention in Beijing, capital of China, Nov. 20, 2019. The 2019 World 5G Convention will open here on Nov. 21.

Photo taken on Nov. 20, 2019 shows the venue for the 2019 World 5G Convention during a press preview in Beijing, capital of China. The 2019 World 5G Convention will open here on Nov. 21.

An exhibitor tests a device during a press preview for the 2019 World 5G Convention in Beijing, capital of China, Nov. 20, 2019. The 2019 World 5G Convention will open here on Nov. 21.

An exhibitor tests a wearable bionic hand during a press preview for the 2019 World 5G Convention in Beijing, capital of China, Nov. 20, 2019. The 2019 World 5G Convention will open here on Nov. 21.

A Huawei Atlas 800 AI server is on display during a press preview for the 2019 World 5G Convention in Beijing, capital of China, Nov. 20, 2019. The 2019 World 5G Convention will open here on Nov. 21.

An exhibitor shows a security robot during a press preview for the 2019 World 5G Convention in Beijing, capital of China, Nov. 20, 2019. The 2019 World 5G Convention will open here on Nov. 21.

Exhibitors display 5G-powered technologies during a press preview for the 2019 World 5G Convention in Beijing, capital of China, Nov. 20, 2019. The 2019 World 5G Convention will open here on Nov. 21.

A visitor joins an AR (augmented reality) concert during a press preview for the 2019 World 5G Convention in Beijing, capital of China, Nov. 20, 2019. The 2019 World 5G Convention will open here on Nov. 21.

Two robotic arms play the piano during a press preview for the 2019 World 5G Convention in Beijing, capital of China, Nov. 20, 2019. The 2019 World 5G Convention will open here on Nov. 21.

A staff member shows a 5G-powered remote driving system during a press preview for the 2019 World 5G Convention in Beijing, capital of China, Nov. 20, 2019. The 2019 World 5G Convention will open here on Nov. 21. (Xinhua/Ren Chao)

A Huawei Atlas 800 AI server is on display during a press preview for the 2019 World 5G Convention in Beijing, capital of China, Nov. 20, 2019. The 2019 World 5G Convention will open here on Nov. 21.

A visitor tries a 5G-powered game during a press preview for the 2019 World 5G Convention in Beijing, capital of China, Nov. 20, 2019. The 2019 World 5G Convention will open here on Nov. 21.