Generally, books are browsed from two sides, the other page is a new page, and the right page is the right page. The implication is that if there is nothing to put on the left page, it is empty (called the back page) and must be placed on the right page.

Starting from another page means that some articles (such as essays) are arranged from a single code. If the first article ends with a single page number and the second article requires a new page, you must leave a double-code blank after the previous article, that is, put an empty code. The arrangement of each article that requires a separate page is usually used for single-sided printing.