Mobile photo shows people visiting the World Robot Exhibition in Beijing, capital of China, Aug. 24, 2019. (Photo: Xinhua)

Mobile photo shows people visiting the World Robot Exhibition in Beijing, capital of China, Aug. 24, 2019. (Photo: Xinhua)

Mobile photo shows people visiting the World Robot Exhibition in Beijing, capital of China, Aug. 24, 2019. ((Photo: Xinhua)

Mobile photo shows people visiting the World Robot Exhibition in Beijing, capital of China, Aug. 24, 2019. (Photo: Xinhua)

Mobile photo shows people visiting the World Robot Exhibition in Beijing, capital of China, Aug. 24, 2019. (Photo: Xinhua)

Mobile photo shows a Swiss-made robot dog at the World Robot Exhibition in Beijing, capital of China, Aug. 20, 2019. (Photo: Xinhua)

Mobile photo shows a fire fighting robot at the World Robot Exhibition in Beijing, capital of China, Aug. 20, 2019. (Photo: Xinhua)

Mobile photo shows a surgical robot at the World Robot Exhibition in Beijing, capital of China, Aug. 20, 2019. (Photo: Xinhua)

Mobile photo shows a China-made robot dog at the World Robot Exhibition in Beijing, capital of China, Aug. 20, 2019. (Photo: Xinhua)