https://blog.wongcw.com/2020/11/16/%e6%bc%ab%e9%81%93%e9%87%91%e6%9c%8d%e5%86%8d%e6%88%b0ipo%e8%a2%ab%e8%ad%89%e7%9b%a3%e6%9c%83%e7%b5%82%e6%ad%a2%e5%af%a9%e6%9f%a5%e6%97%97%e4%b8%8b%e5%af%b6%e4%bb%98%e6%9b%be%e8%a2%ab%e6%9b%9d/