Refers to the written content in calligraphy works other than the written content. Including the source of the text content, the gift object, the creation reason, the creation time, the author's name and font size, etc. There are two kinds of signatures, which put the object and author of the book above and below respectively. The former is the previous paragraph and the latter is the next paragraph. The preceding paragraph shall specify the name, source and recipient's name of the work. The next paragraph describes the year, place and author's name of creation. The position of the preceding paragraph should be higher to show respect, including polite address. Write down the time, place and name in the next paragraph.