According to the specifications for publishing eBooks, the table of contents of your eBook must contain

• at least 3 links. These links are used to navigate within the eBook and allow readers to jump directly to specific sections or chapters.


• In addition to the links, the table of contents must be included as an HTML file in the eBook
  file itself. This ensures that the table of contents is displayed and linked correctly, regardless
  of the specific reading environment or software used to open the eBook.

Compliance with these requirements is essential to ensure that your eBook meets the quality
standards and guidelines for publishing on Feiyr.com and other platforms. A well-structured
and complete table of contents makes it easier for readers to navigate your eBook and access
the content they want