Why did novels turn into letters on the phone?

This question involved some technical details of downloading a novel to a mobile phone. Normally, after a novel was downloaded to a mobile phone, it would be converted into text in the browser's browser. It is a mark-up language that can be used to create web pages. When creating a novel's webpage, authors would usually use special tags to identify chapters, titles, characters, and other information. These special marks usually contained letters or special symbols such as "<",">","", and so on. When the novel was converted to the original format, these special tags would be replaced with the corresponding code. This code allowed the browser to understand the content of the novel and display it on the screen. However, if the novel contained a specific font, the novel downloaded to the phone might appear as a letter because the phone's operating system or browser did not support the font. This was because the font was a symbolic language that could be used to express the color, size, direction, and other information of the text. If the phone's operating system or browser did not support a specific font, they would not be able to display the text in the novel correctly. Therefore, if a novel was downloaded to a mobile phone and displayed as a letter, it might be because the novel contained a certain font or the mobile phone's operating system or browser did not support the font.