Warning signs against noise should be arranged in parallel sentences.

No noise, make the world quieter; No noise, make the world more civilized; No noise, make the world a better place; Stop making noise and let's act! [teaching building]

Noisy is not conducive to learning, and slapstick is harmful to civilization.

With noise, I can't be calm; With slapstick, others can't think.

Civilized language starts with me and civilized behavior starts with me.

Civilize your language and elegant your manners.

"Please turn yourself into' vibration', preferably' silence'"

"Please greet everyone in the reading room. The action is to straighten the index finger vertically and gently put it in front of your lips. "

Cinema:

"Friend, do you want to commit suicide slowly? Then go out and smoke! "

"I hope that's not a cigarette in your hand, but popcorn."

"In fact, don't light a cigarette, it will take longer."

"Don't light a lighter, the light will affect the screen."

"Don't make smoke, it can't take a sauna."

"Look at this beautiful lady beside you. She must not like cigarettes."