Maybe it was stolen by a scalper. Generally speaking, stealing star signatures is done by scalpers. They want to resell these signatures to crazy idolaters. Some fans are particularly eager to get the autograph of their idols, and even willing to pay a high price. Bian Xiao thinks this behavior is still irrational, because just a signature doesn't mean that you have actually seen the star. Even if you put this signature at home and put it in a photo frame, you can only read it, which has no practical use.
Sensible idolization, but for fans, it is very happy to get an idol's autograph, but usually this happens to those who have a small flow of fresh meat. So people are particularly curious about what kind of crazy fans would like an old-timer like Zhang Yimou Lee? Another possibility is that they want to use these signatures for some illegal purposes. For example, a product launched by a merchant is endorsed by these stars and has their signatures, so many people will believe that this star is really related to this endorsement.
After discovering that the signature board was lost, the organizer immediately chose to call the police, hoping to catch the thief as soon as possible. Whether we are idolizing or participating in activities, we should treat the stars rationally, and don't bring troubles to their lives, which also means that we are a quality person.