Photo taken on Aug. 21, 2019 shows a patrolling robot exhibited at the World Robot Exhibition in Beijing, capital of China. The exhibition, part of the 2019 World Robot Conference that kicked off Tuesday, features various kinds of robots in different uses, including in industries, services and logistics. During the exhibition, the public have the opportunities to see exhibits of cutting-edge robot technologies and products from more than 180 renowned domestic and overseas companies and research institutions engaged in robot industries. (Xinhua/Li Xin)