"Diligence and self-cultivation, diligence and self-cultivation" comes from Zhuge Liang's commandment book. This is a letter written by Zhuge Liang to his son Zhuge Zhan, aiming at teaching how to be a man and cultivate one's morality. This sentence means diligence and self-cultivation. The Book of Commandments was written in the 12th year of Jianxing in Shu Han Dynasty (234). It was a letter written by Zhuge Liang to his eight-year-old son Zhuge Zhan in his later years. Summarize the experience of being a man and doing research, focus on the word "quiet", and at the same time attribute the failure to the word "mania", which is in sharp contrast. The main idea of the article is to persuade my son to study hard, to be determined, to cultivate self-cultivation and to work hard from indifference and tranquility, and not to be lazy and impatient.