Special signs are better and more expensive. Pro-signature is the author's personal signature, directly signing his own name, and special signature refers to special signature. Besides signing the author's name, the author can also write some words. First, it is necessary to determine whether the author is willing to give it and whether it can be specially signed. The number is limited, and the top number can receive the author's special signature. Secondly, the price of special signature is higher than that of personal signature.