https://blog.wongcw.com/2020/03/12/magisk%e7%9a%84root%e9%9a%b1%e8%97%8f%e5%8a%9f%e8%83%bd%e8%a6%81%e6%b6%bc%e4%ba%86%e6%96%b0%e7%89%88safetynet%e7%94%a8%e4%ba%86%e7%a1%ac%e4%bb%b6%e7%b4%9a%e6%aa%a2%e6%b8%ac/