https://blog.wongcw.com/2019/01/28/canalys%ef%bc%9a2018%e5%b9%b4%e4%b8%ad%e5%9c%8b%e6%99%ba%e8%83%bd%e6%89%8b%e6%a9%9f%e5%b8%82%e5%a0%b4%e5%87%ba%e8%b2%a8%e9%87%8f%e5%90%8c%e6%af%94%e8%b7%8c%e9%80%be14/