Self-improvement. There is such a sentence at the beginning of the Book of Changes, "Heaven is healthy, and gentlemen are constantly striving for self-improvement; The terrain is Kun, and the gentleman carries things with morality. " That is, Tsinghua University's school motto-self-improvement, kindness and morality. Therefore, the first point I want to say is-self-improvement. Self-improvement is an attitude towards life, but it is also an idea, a cultivation and a realm of being a man. Live like a hero and die like a ghost. It is very rare for a person to fight once when he lives. So people must be positive, optimistic and enterprising when they are alive! For the prosperity of our motherland, to show our more social values, and to let our families live a better life … This is our unshirkable responsibility and mission! God gave me the ultimate useful talent. In the vast universe, in the cycle of heaven, in the long river of history, although we are just a drop in the ocean, a flash in the pan, we finally came to the world, so we should be the brightest star and become an eternal moment in the moment of radiance! Although our bodies will turn into spring mud, our stories, our spirits and our thoughts will become an immortal culture!