WordPress: Change the background font to Microsoft Yahei

This problem has actually bothered me for a long time. The default background font is really terrible. Today I finally found a good solution, a perfect solution.

In functions.php of the current theme, add the following code:

/**
 * Change the background font to Microsoft Yahei
 */
function change_admin_font(){
    echo '';
}
add_action('admin_head', 'change_admin_font');

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