The child's inner quality and personality characteristics are expressed through external behavioral habits. Therefore, we need to promote the development of a healthy personality by cultivating children's good habits in the details of daily life. Recently, a letter from a friend of the school to the parents of the choir was in the circle of friends. This article mentioned that the children of this famous school choir won the silver cup in the international competition, but they did not understand politeness, did not take the initiative to help others and lacked education in civility and etiquette. The article has aroused the resonance of many teachers and parents. The letter was written by the principal to the parents of the choir students when he was transferred to Moscow. The reason why the principle was widely spread was that its content was of profound educational significance. On the one hand, there is a big contrast between the “famous school” and “good student” status of these s