1. Right-click the desktop and check Properties-Appearance-Advanced-Project. The font that can be changed here is Microsoft Yahei. The default size is 8, which is generally changed to 9 or 10.

2. "Start-Run", enter "regedit" without double quotation marks to open the registry. There is a GUIFont. The Facename on the right of HKEY _ local _ machine \ software \ Microsoft \ Windows NT \ Current Version \ GRE _ initialize is changed to Microsoft Yahei.

3. Open IE, Internet Options-General-Font-Web Font, and set it to Microsoft Yahei.

For some web pages, there are also PHP forums by default, such as Fan Fei. You must also check the font samples of unused web pages in general accessibility features.