https://blog.wongcw.com/2020/05/27/slack-ceo%ef%bc%9a%e5%be%ae%e8%bb%9f%e5%9f%b7%e8%91%97%e6%96%bc%e7%94%a8%e4%b8%8d%e5%81%a5%e5%ba%b7%e6%89%8b%e6%ae%b5%e6%ae%ba%e6%ad%bb%e6%88%91%e5%80%91/