Drone World Congress 2019 kicks off in China's Guangdong

People visit the 4th Shenzhen International UAV Expo in south China's Guangdong Province, June 20, 2019. The Drone World Congress 2019 and the 4th Shenzhen International UAV Expo opened here on Thursday. Over 400 enterprises will show more than 1,000 drones at the event. (Xinhua/Wang Feng)