Pro-signing fans usually prepare in advance after knowing the situation in advance, because it is more difficult to grab, so when the official releases it, they usually grab the pro-signing in two seconds, so they grab it in less than 10 second.

Signature means autograph. To sign, that is, to write one's name, especially to express agreement, recognition, responsibility or obligation. At present, there are more interpretations of signatures, such as digital signatures and artistic signatures. Or a star's meaningful signature, also called signature.