As a theater worker, I can tell you: Pay attention to whether there is a chance to meet the actors after the performance. Some performers will arrange such activities in the lobby of the theater. Don't miss it. In addition, in the days before and after the premiere, performers sometimes hold lectures, creative activities or actors' meetings, which are to promote musicals. If you are interested, you are recommended to participate. Others clapped hard at the right time and at the end of the performance. It is also good to stand up, applaud and cheer when you are excited. If you want to take pictures as a souvenir, you can take pictures before and after the performance and when the actors begin to take a curtain call. Don't turn on the flash. Actors can't take pictures while performing.