A solar-powered drone is controlled by students of Nanchang Hangkong University (NCHU) in Nanchang, east China's Jiangxi Province, Jan. 14, 2015. Designed by a R&D group of the NCHU, the drone can stay in the air in well-lighted condition and its larger-sized version is capabale of bearing maximum take-off weights up to 5 kilograms. (Xinhua/Wan Xiang)
