1. The title of a book is a punctuation mark used to express the title of a book, an article, a newspaper, a file name, an opera name, etc.

2. It is also used for literary and artistic works closely related to written media, such as songs, movies and TV plays.

3. Book titles should be used in pairs. When the book title is used together with the book title, you should write the book name first, then the book name, with a space in the middle and then the book title. The common nouns after the title indicate the category to which the work belongs.

4. The common nouns indicating the category of the work after the title are not marked in the title. If there are exclamation marks or question marks at the end of the title and article title, they should be placed in the title.