Greatness is not only earth-shattering in his career, he is always thoughtful and silent. The famous Russian writer Krylov once said: Greatness is not only earth-shattering in his career, he is always thoughtful and silent. It is not wise to just work hard without summarizing the successes or reflecting on the failures. A wise person should adjust his direction through continuous practice and think about the key points of training, so as to make greater progress.