A book generally consists of seven parts: cover, title page, table of contents, text, title, page number and auxiliary text (preface, postscript, quotation, footnote, appendix, index and reference). \x0d\ The cover of a book includes five parts: the front cover (the first cover), the inner page (the second cover), the back cover (the third cover), the back cover (the fourth cover) and the spine. \x0d\ cover, also called book cover or cover 1, records information such as book title, volume, volume number, author, edition and publishing house. Cover can enhance the ideological and artistic quality of books and deepen the publicity of books, which is different from ordinary paintings in design. The cover of the book is subordinate to the content of the book, and at the same time, the types of readers should be considered to make readers understand; \x0d\ Inside the cover, also called the second cover, refers to the inside of the cover; \x0d\ at the bottom, also called Feng San; \x0d\ Back cover, also called four letters or back cover, is the last page of a book and is connected with the cover. In addition to the unified book number, pricing and bar code, they are generally blank, and some will have abstracts, descriptions, author introductions and other contents, and even some books related to this book will be advertised, and the publicity effect is better than that of the second cover and the third cover. \x0d\ spine of a book, spine of a book, and the joint between the front cover and the back cover of a paperback book and a hardcover book. Generally printed with the title of the book, the name of the author, the name of the publishing unit, etc. , also known as the back of the book. \x0d\ title page, also called inner page. After the second cover or insert, the printed text is similar to the cover, but the content is more detailed. The function of the title page is firstly to supplement titles, works, publishing houses and other items, and secondly to decorate books to increase aesthetic feeling. \x0d\ Auxiliary text is the content that plays an auxiliary explanation or reference role in the book content, such as abstract, crown map, preface, preface, table of contents, addendum, appendix, notes, references, index, postscript (postscript) and so on.