A Solar Impulse 2 drawing by Huang Wenting, a senior student at Nanjing University of Aeronautics and Astronautics who has been drawing airplanes for her graduate project. When some of her drawings were posted online, the Internet community was stunned by their beauty and details, and airplane fans from all over sent her their highest regards. Solar Impulse 2 is the biggest solar-powered aircraft in the world from a Swiss long-range experimental project. The Solar Impulse project intends to achieve the first circumnavigation of the Earth by a piloted fixed-wing aircraft using only solar power. [Photo/ Nanjing University of Aeronautics and Astronautics]