Han Yu said in "Teacher's Theory" that "a teacher should preach, impart knowledge and resolve doubts", that is, an educator's responsibility is first to "preach" (moral education), and secondly to impart knowledge. Dispel doubts (solve doubts and resolve difficulties). We believe that school is not only a place for students to learn knowledge, but also a place for students to become adults and a place for students to form a correct outlook on life and values. Therefore, moral education is the main link to ensure the healthy growth of students and is the top priority of schools.