https://blog.wongcw.com/2022/07/30/60%e5%b9%b4%e5%89%8d%e8%80%81%e9%81%8a%e6%88%b2%e3%80%8aspacewar%e3%80%8b%e7%99%bb%e9%99%b8analogue%e6%8e%8c%e6%a9%9fpocket/