A staff member (1st R) introduces a multi-rotor drone to visitors at East China Unmanned Aerial Vehicles (UAV) Base in Shanghai, east China, Aug. 30, 2018. The UAV Base with airspace of 58 square kilometers for test-fly opened here on Thursday. The establishment of the base aims to boost the development of drone industry in Shanghai and East China. (Xinhua/Fang Zhe)