https://blog.wongcw.com/2022/10/19/rng%e3%80%8adota2%e3%80%8b%e6%88%b0%e9%9a%8a%e5%85%a8%e5%93%a1%e6%aa%a2%e6%b8%ac%e9%99%bd%e6%80%a7entity%e9%9a%8a%e9%95%b7%e7%a5%9d%e6%97%a9%e6%97%a5%e5%ba%b7%e5%be%a9/