Photo taken on Aug. 21, 2019 shows a logistics 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.

Photo taken on Aug. 21, 2019 shows domestic robots 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.

Photo taken on Aug. 21, 2019 shows an underwater 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.

Photo taken on Aug. 21, 2019 shows an industrial 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.

Photo taken on Aug. 21, 2019 shows civil intelligent robots 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.

Photo taken on Aug. 21, 2019 shows a pipeline 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.

Photo taken on Aug. 21, 2019 shows a mechanical arm and its controlling equipment 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.

Photo taken on Aug. 21, 2019 shows a robot for minimally invasive surgery 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.

Photo taken on Aug. 21, 2019 shows robots for home use 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.

Photo taken on Aug. 21, 2019 shows a 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.

Photo taken on Aug. 21, 2019 shows an operation 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.

Photo taken on Aug. 21, 2019 shows a civil 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.

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. (Photos: Xinhua)