Special signature refers to how many top writers can receive the author's special signature when a writer publishes a physical book.

Signing is writing one's own name, especially expressing agreement, recognition, responsibility or obligation. There are more interpretations of signature, such as digital signature, artistic signature and so on. Or a star's meaningful signature, also called signature. Signature is a kind of signature, because the signature is used the most, so the signature is often corrupted into a signature. Traditionally, signature is not synonymous with signature.