People watch an auto-pilot car during the 2019 China International Fair for Trade in Services (CIFTIS) in Beijing, capital of China, May 28, 2019. The 2019 China International Fair for Trade in Services (CIFTIS) opened here on Tuesday. (Photos: Xinhua)

People talk with an exhibitor of the African exhibition area during the 2019 China International Fair for Trade in Services (CIFTIS) in Beijing, capital of China, May 28, 2019. The 2019 China International Fair for Trade in Services (CIFTIS) opened here on Tuesday.

A man interacts with a portable smart robot during the 2019 China International Fair for Trade in Services (CIFTIS) in Beijing, capital of China, May 28, 2019. The 2019 China International Fair for Trade in Services (CIFTIS) opened here on Tuesday.

A man tries a leg-rehabilitation robot during the 2019 China International Fair for Trade in Services (CIFTIS) in Beijing, capital of China, May 28, 2019. The 2019 China International Fair for Trade in Services (CIFTIS) opened here on Tuesday.

People interact with a smart educational toy brick robot during the 2019 China International Fair for Trade in Services (CIFTIS) in Beijing, capital of China, May 28, 2019. The 2019 China International Fair for Trade in Services (CIFTIS) opened here on Tuesday.