你应该在你的主题文件夹中找到一个名为 header.php 的文件，位于 /wp-content/themes/{your-theme} 这是您可以在其中添加代码的模板文件.

You should find a file named header.php inside your theme's folder located in /wp-content/themes/{your-theme} that's the template file where you can add your code.