As a graduate student who takes the doctoral entrance examination, Space spirit has encouraged me greatly and kept me moving forward. No matter how great success I have achieved, it is not the achievement but the hunger for learning that really matters. There is no end to learning, in which case I must learn not only curiously but also with modesty. Only by this way of hard working will I learn better and get richer results in the coming study, thus laying a solid foundation for my future success