https://blog.wongcw.com/2019/05/27/wifi%e8%90%ac%e8%83%bd%e9%91%b0%e5%8c%99v4-3-61-%e5%9c%8b%e5%85%a7%e7%89%88-v4-6-17-%e5%9c%8b%e9%9a%9b%e7%89%88-%e6%a5%b5%e9%80%9f%e7%89%88v6-0-21-for-android/