Delegates attend the opening ceremony of China's first test-flight base for civilian drones at Qingpu Modern Agriculture Park in Shanghai, east China, Aug. 31, 2017. The first test-flight base for civilian drones opened in Shanghai on Thursday, according to the East China Regional Administration of Civil Aviation Administration of China (CAAC). Drones are required to fly under 150 meters and all test flights are be monitored for safety in the base. (Xinhua/Fang Zhe)
