https://blog.wongcw.com/2022/05/09/gan%e4%b9%8b%e7%88%b6ian-goodfellow%e5%be%9e%e8%98%8b%e6%9e%9c%e8%be%ad%e8%81%b7%ef%bc%9a%e6%88%91%e4%b8%8d%e6%83%b3%e5%9b%9e%e8%be%a6%e5%85%ac%e5%ae%a4%e4%b8%8a%e7%8f%ad/