https://blog.wongcw.com/2020/08/09/%e6%97%a5%e6%9c%ac%e4%b8%80%e5%88%a9%e7%94%a8%e8%98%8b%e6%9e%9cairdrop%e5%af%a6%e6%96%bd%e7%97%b4%e6%bc%a2%e8%a1%8c%e7%82%ba%e7%9a%84%e7%94%b7%e6%80%a7%e8%a2%ab%e6%8d%95/