1. Click "Menu" at the top of the itunes interface and select to add Chinese document files to the database.

2. Click "Books", and you can see that all the added books are in the project.

3. Connect the device to the computer with a data cable, then click the Book tab to select the synchronized book, and wait for the synchronization to end.

4. Run the reader "ibooks" and select the Chinese document file. At this time, you can find synchronized e-books in the list, and you can see them when you open them.