How to get a photo and signature when attending TFBOYS concert?

First of all, black powder and people who don't answer questions seriously go out and turn left. Thank you. Anyway, if you want TFBOYS to sign or take a photo, you'd better not do it at the concert, because there are many people, or you will be stopped by the staff. It's best to ask for it at a special autograph meeting. There is generally no group photo, unless you meet TFBOYS, but you will still be stopped by the assistant. Well, don't take the initiative to take a group photo, and leave them more time.