1, Instrument: Boys should shave and keep clean, and don't have long hair, big sideburns or beards. Girls should wear light makeup, not heavy makeup and exaggerated jewelry. 2. Dress: Boys should wear suits or tunic suits, not uniforms. Girls should wear suits or skirts and avoid sleeveless shirts and miniskirts. 3. Manner: Walk briskly, don't look around. When talking to people, keep your eyes on them, don't look around. It is not advisable to talk loudly, whisper or make other small moves in public. 4. Speaking: Keep your language fluent and your voice moderate when you speak. It's not appropriate to talk loudly, and you can't spit and dance. You should avoid using vulgar, obscene and rude language when talking. 5. Politeness: Say hello when you meet, address appropriately and greet kindly. When you meet for the first time, you should say "Hello!" "I'm so glad to see you!" Wait a minute.