https://blog.wongcw.com/2021/06/27/%e6%b6%88%e6%81%af%e7%a8%b1%e6%bb%b4%e6%bb%b4%e5%87%ba%e8%a1%8c%e7%be%8e%e8%82%a1ipo%e5%b7%b2%e7%8d%b240%e5%84%84%e7%be%8e%e5%85%83%e5%85%a8%e9%a1%8d%e8%aa%8d%e8%b3%bc%e9%a0%90%e6%9c%9f%e4%b8%8b/