https://blog.wongcw.com/2019/11/14/canalys%ef%bc%9a%e4%b8%89%e5%ad%a3%e5%ba%a6%e5%85%a8%e7%90%83%e6%99%ba%e8%83%bd%e9%9f%b3%e7%ae%b1%e5%b8%82%e5%a0%b4%e5%a2%9e44-9-%e4%ba%9e%e9%a6%ac%e9%81%9c%e5%b1%85%e9%a6%96/