https://blog.wongcw.com/2018/11/27/iphone-xr-%e6%97%a5%e6%9c%ac%e7%9c%9f%e7%9a%84%e9%99%8d%e5%83%b9%e4%ba%86%e9%81%8b%e7%87%9f%e5%95%86%e6%96%b0%e6%96%b9%e6%a1%88%e5%8f%aa%e8%a6%81%e4%b8%89%e6%8a%98/