Teenagers should remember to be polite, and everyone will praise them when they see them. Do your best, sit upright, walk steadily, have a good expression, behave gracefully and respectfully, be praised, and have a good afterlife. Pay attention to etiquette, respect people, don't swear, and don't do ugly things. Beautiful language, people like to listen, study hard, be smart, respect their elders, be filial to their parents, be praised, and be a good descendant. Go out and get lost. Ask your uncle, grandmother and aunt. My uncle said, be polite and speak clearly. Helping others is better than helping relatives. Speak ill, cause trouble and set yourself on fire. Good people are rewarded, and bad people are hated. Learn character when you are a teenager and become a good person when you grow up.