In fact, there is a misunderstanding about the flight design of Beihang University. The major of flight design is not necessarily the research direction of the tutor. Many teachers in the Institute of Solid Fluids also study flight design. This year, 343 is a bit hanging (if you are a non-flight design major in a foreign school). If you fail (I hope it won't happen), you can try to transfer to another institute (solid fluid, etc.). ) Then choose a tutor to learn to fly. In addition, fluids don't have to fly, but fluids are more difficult.