Photo shows a neurosurgical robot on display at the 22nd China Beijing International High-Tech Expo held in Beijing, capital of China, starting from Oct. 24. Representatives from two international organizations and delegations from 19 countries and regions have participated in the four-day event. (Photos: China News Service)

Visitors look at a UFO-shaped aircraft at the 22nd China Beijing International High-Tech Expo held in Beijing, which started on Oct. 24. Representatives from two international organizations and delegations from 19 countries and regions have participated in the four-day event.

Visitors inspect a building component of a Winter Olympics venue at the 22nd China Beijing International High-Tech Expo held in Beijing, starting from Oct. 24. Representatives from two international organizations and delegations from 19 countries and regions have participated in the four-day event.

Photo shows police robots displayed at the 22nd China Beijing International High-Tech Expo held in Beijing, which started on Oct. 24. Representatives from two international organizations and delegations from 19 countries and regions have participated in the four-day event.

Visitors experience the unmanned test platform at the 22nd China Beijing International High-Tech Expo held in Beijing. The four-day expo opened on Oct. 24, drawing more than 1,200 exhibitors.

Photo shows the protective costumes used in The Wandering Earth, a Chinese sci-fi blockbuster, at the 22nd China Beijing International High-Tech Expo held in Beijing. The four-day expo opened on Oct. 24, drawing more than 1,200 exhibitors.

Visitors appreciate the model of an intelligent subway train made by a major Chinese train producer at the 22nd China Beijing International High-Tech Expo in Beijing. The four-day expo opened on Oct. 24, drawing more than 1,200 exhibitors.

Photo shows the model of a new energy demonstration unmanned aerial vehicle at the 22nd China Beijing International High-Tech Expo in Beijing. The four-day expo opened on Oct. 24, drawing more than 1,200 exhibitors.

Visitors look at the sand table of the snowmobile stadium in the Beijing 2022 Winter Olympics at the 22nd China Beijing International High-Tech Expo in Beijing. The four-day expo opened on Oct. 24, drawing more than 1,200 exhibitors.

Visitors learn about the structure of the cochleae at a language rehabilitation area of the 22nd China Beijing International High-Tech Expo held in Beijing, starting from Oct. 24. Representatives from two international organizations and delegations from 19 countries and regions have participated in the four-day event.

Visitors operate a simulated shooter for the Beijing 2022 Winter Olympics events at the 22nd China Beijing International High-Tech Expo in Beijing, starting from Oct. 24. Representatives from two international organizations and delegations from 19 countries and regions have participated in the four-day event.

Photo shows hydrogen fuel cell engine at the 22nd China Beijing International High-Tech Expo in Beijing, starting from Oct. 24. Representatives from two international organizations and delegations from 19 countries and regions have participated in the four-day event.

Photo shows the protective costumes used in The Wandering Earth, a Chinese sci-fi film, at the 22nd China Beijing International High-Tech Expo held in Beijing, capital of China. The four-day expo opened on Oct. 24, drawing more than 1,200 exhibitors.

Visitors feel the impact of hearing disabilities at the language rehabilitation area of the 22nd China Beijing International High-Tech Expo held in Beijing, starting from Oct. 24. Representatives from two international organizations and delegations from 19 countries and regions have participated in the four-day event.