https://blog.wongcw.com/2022/01/12/%e4%b8%96%e7%95%8c%e8%a1%9b%e7%94%9f%e7%b5%84%e7%b9%94%ef%bc%9aomicron%e5%8f%af%e8%83%bd%e5%9c%a8%e6%95%b8%e9%80%b1%e5%85%a7%e6%84%9f%e6%9f%93%e5%8d%8a%e6%95%b8%e6%ad%90%e6%b4%b2%e4%ba%ba/