A service robot moves through a corridor to deliver items at a hotel in Chaoyang District of Beijing, capital of China, Aug. 13, 2022.Photo:Xinhua

A service robot is seen during an expo of the World Robot Conference 2022 (WRC 2022) in Beijing, capital of China, Aug. 18, 2022.Photo:Xinhua

A service robot is seen during an expo of the World Robot Conference 2022 (WRC 2022) in Beijing, capital of China, Aug. 18, 2022.Photo:Xinhua

A service robot is seen during an expo of the World Robot Conference 2022 (WRC 2022) in Beijing, capital of China, Aug. 18, 2022.Photo:Xinhua

Engineers of a service robot company set up a service robot at Zhongguancun Dongsheng science park in Haidian District of Beijing, capital of China, Aug. 15, 2022.Photo:Xinhua