https://blog.wongcw.com/2019/01/13/%e7%84%a1%e7%b7%a3android-9-0-lg%e5%ae%a3%e5%b8%83g5-v20%e4%b8%8d%e5%86%8d%e6%8f%90%e4%be%9b%e6%9b%b4%e6%96%b0%e6%94%af%e6%8c%81/