https://blog.wongcw.com/2022/05/14/rng%e4%b8%bb%e6%95%99%e7%b7%b4%e6%9c%b1%e9%96%8b%e5%9b%9e%e6%87%89%e9%87%8d%e8%b3%bd%ef%bc%9a%e6%89%93%e5%ae%8c3%e5%a4%a9%e6%89%8d%e7%99%bc%e7%8f%be%e5%bb%b6%e9%81%b2%e5%a4%aa%e8%aa%aa%e4%b8%8d/