https://blog.wongcw.com/2019/05/10/canalys%ef%bc%9aiphone-xr%e5%8c%97%e7%be%8e%e4%b8%8a%e5%ad%a3%e5%ba%a6%e5%87%ba%e8%b2%a8%e9%87%8f450%e8%90%ac/