A staff member puts items for delivery inside a service robot at a hotel in Chaoyang District of Beijing, capital of China, Aug. 13, 2022. (Xinhua/Ren Chao)

　　A service robot moves through a corridor to deliver items at a hotel in Chaoyang District of Beijing, capital of China, Aug. 13, 2022. (Xinhua/Ren Chao)

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

　　An engineer of a service robot company sets up a delivery robot at Zhongguancun Dongsheng science park in Haidian District of Beijing, capital of China, June 22, 2022. (Xinhua/Jin Haoyuan)

　　A service robot is seen during an expo of the World Robot Conference 2022 (WRC 2022) in Beijing, capital of China, Aug. 20, 2022. (Xinhua/Ren Chao)

　　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. (Xinhua/Ren Chao)

　　Engineers of a service robot company have a meeting for a solution at Zhongguancun Dongsheng science park in Haidian District of Beijing, capital of China, Aug. 17, 2022. (Xinhua/Ren Chao)

　　A service robot is seen at Zhongguancun Dongsheng science park in Haidian District of Beijing, capital of China, Aug. 15, 2022. (Xinhua/Ren Chao)

　　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. (Xinhua/Ren Chao)

　　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. 17, 2022. (Xinhua/Ren Chao)