Hello, is it the iOS version? Because many e-books are beautifully made and use a variety of professional fonts. In order to let users enjoy professional typesetting, genuine fonts will be downloaded in the background when connected to WIFI.

Please don't get me wrong, fonts are definitely not automatically downloaded as soon as they are turned on. If you are an iOS version, you can only download it in the WIFI environment.

If you are an Android version, you must have your permission before downloading fonts on WIFI.

If you don't need to download fonts, you can turn off the download option. The specific method is:

Open a book, click on the screen, and bring up the menu-Options-More Reading Options-Font-Chinese Font-WIFI network to automatically download the font library, just turn it off.