List the e-books to be published in detail and make pictures. Then enter the salted fish, click Publish, and click Publish Idle. Select the picture of the book list and upload it. Enter a description, try not to reflect the book, and modify the description. Choose other idle books in the classification, not books, because books need to scan bar codes, and e-books have no bar codes, so choose other idle books. In this way, the e-books that need to be processed are successfully released.

Extended data:

Anything can be sold on idle fish, as long as it is not illegal, so information can be sold.