Inscription refers to the written content except the written content in calligraphy works. Inscription includes: the source of text content, the object of gift, the reason of creation, the time of creation, the author's name and font size, etc. First, the format of the signature is "double paragraph" and "single paragraph". In the two paragraphs, the object and author of the book are placed above and below respectively, the former is the upper paragraph and the latter is the lower paragraph. The preceding paragraph shall specify the name, source and recipient's name of the work; The next paragraph describes the date, place and author's name of creation. The preceding paragraph: the position should be higher to show respect, including name, title and modesty. Next paragraph: Write the time, place, name and modesty. If there is a previous paragraph but there is no previous paragraph, it is called a single paragraph, which may or may not contain the contents of the previous paragraph.