Respecting teachers in students' etiquette

Students should take the initiative to salute and say hello to teachers when they enter and leave campus or go up and down stairs to meet them. When students enter the teacher's office or dormitory, they should knock at the door first, and they should not give their classmates insulting nicknames. They shouldn't laugh at their physical defects. On these issues concerning self-esteem, we must be cautious and respectful. Don't talk about the taboo topics of classmates, and don't talk about classmates casually.