I noticed the movie Diary of Politeness.

When you go to the theater to watch a performance, you should dress solemnly and appropriately, and you can't wear vest slippers in summer. Don't smoke in the stadium.

When going to the cinema to see a movie or a performance, the audience should try to enter the cinema in advance or on time. At the entrance, take the initiative to show your tickets, ask the staff to check, and sit in the right position after admission. If you are late, the other audience will sit down, and their seats are inside. Please politely ask others to make way for yourself at this time. When you pass in front of others, you should thank the passers-by and walk sideways instead of turning your back on others.

In terms of etiquette, when going to the theater to watch a performance, latecomers should consciously stand behind the theater, enter the theater only during the intermission, or sit down quietly until the performance on the stage is nearing the end.

When the audience goes to the theater to watch the performance, they should take off their hats after taking their seats. Don't occupy the armrests on both sides of the chair when sitting, but take good care of your neighbors. When watching the performance, don't shake your head, dance or whisper to each other, so as not to obstruct the view of the audience behind you. Don't talk too much, so as not to affect the surrounding audience. Don't hiss, whistle or scream while watching the performance. Snack-loving viewers should refrain from eating noisy food with shells.