https://blog.wongcw.com/2021/11/29/%e4%b8%96%e8%a1%9b%e8%ad%a6%e5%91%8a%ef%bc%9a%e6%96%b0%e6%af%92%e6%a0%aaomicron%e7%b8%bd%e9%ab%94%e9%a2%a8%e9%9a%aa%e9%9d%9e%e5%b8%b8%e9%ab%98-%e7%82%ba%e4%bb%80%e9%ba%bc%ef%bc%9f/