https://blog.wongcw.com/2019/07/12/mate-20%e8%bf%8e%e4%be%86emui-9-1%e6%9b%b4%e6%96%b0%ef%bc%8c%e6%9c%88%e4%ba%ae%e6%a8%a1%e5%bc%8f%e5%a6%82%e7%b4%84%e5%88%b0%e4%be%86/