https://blog.wongcw.com/2020/10/22/%e8%9e%9e%e8%9f%bb%e9%9b%86%e5%9c%98ipo%e8%a8%bb%e5%86%8a%e7%8d%b2%e8%ad%89%e7%9b%a3%e6%9c%83%e5%90%8c%e6%84%8f%e4%bc%b0%e5%80%bc%e6%88%96%e8%b6%851-7%e8%90%ac%e5%84%84%e5%85%83/