Star's time is precious, so it is difficult to have the opportunity to sign autographs for fans in person. Therefore, the number of star signatures is relatively small, leading to its scarcity. Things are scarce, and star signatures are often expensive. For fans, star signature is not only a name, but also an emotional sustenance, a love for idols and a nostalgia for that wonderful time. It can be used as a bridge between fans and idols and has special commemorative significance.