https://blog.wongcw.com/2020/08/18/%e4%b8%ad%e5%9c%8b%e7%ac%ac%e4%b8%80%e5%ae%b6%ef%bc%9a%e7%b4%ab%e5%85%89%e6%94%af%e6%8c%81emv%e4%b8%80%e8%8a%af%e9%9b%99%e6%87%89%e7%94%a8%e5%a2%83%e5%a4%96%e7%9b%b4%e6%8e%a5%e5%88%b7%e4%ba%ba/