https://blog.wongcw.com/2022/08/03/smart-modular%e6%8e%a8%e5%87%ba%e6%97%97%e4%b8%8b%e9%a6%96%e6%ac%becxl%e5%85%a7%e5%ad%98%e6%a8%a1%e7%b5%84/