Photo taken on Oct. 24, 2019 shows a neurosurgery robot displayed at the 22nd China Beijing International High-Tech Expo in Beijing, capital of China. The four-day expo opened here Thursday, drawing more than 1,200 exhibitors. (Photo/China News Service)
Visitors look at a holographic projecting device during the 22nd China Beijing International High-Tech Expo in Beijing, capital of China, Oct. 24, 2019. The four-day expo opened here Thursday, drawing more than 1,200 exhibitors. (Photo/China News Service)
Visitors tour the 22nd China Beijing International High-Tech Expo in Beijing, capital of China. The four-day expo opened here Thursday, drawing more than 1,200 exhibitors. (Photo/China News Service)
Visitors tour the 22nd China Beijing International High-Tech Expo in Beijing, capital of China. The four-day expo opened here Thursday, drawing more than 1,200 exhibitors. (Photo/China News Service)
