Visitors watch a drone capable of 5G wireless connection at the Drone World Congress 2021 and the Shenzhen International Unmanned Aerial Vehicles (UAV) Expo 2021 in Shenzhen of south China's Guangdong Province, on May 21, 2021. The Drone World Congress 2021 and the Shenzhen International Unmanned Aerial Vehicles (UAV) Expo 2021 kicked off here on Friday. A total of 369 exhibitors have brought in more than 2,000 drone products for display. (Xinhua/Wang Feng)