https://blog.wongcw.com/2019/05/10/%e5%b0%8f%e7%b1%b3mix-3-5g%e7%89%88%e9%80%9f%e5%ba%a6%e6%b8%ac%e8%a9%a6%ef%bc%9a%e9%ab%98%e9%81%941026mbps/