https://blog.wongcw.com/2022/05/31/counterpoint%ef%bc%9a%e7%ac%ac%e4%b8%80%e5%ad%a3%e5%ba%a6%e6%99%ba%e8%83%bd%e6%89%8b%e9%8c%b6%e5%b8%82%e5%a0%b4%e4%bf%9d%e6%8c%81%e5%a2%9e%e9%95%b7%e8%98%8b%e6%9e%9c%e4%bf%9d%e6%8c%81%e7%ac%ac/