https://blog.wongcw.com/2020/11/28/android%e5%92%8cios%e7%ab%afoutlook%e6%96%b0%e5%a2%9ereactions%e5%8a%9f%e8%83%bd%ef%bc%9a%e9%83%b5%e4%bb%b6%e8%81%8a%e5%a4%a9%e6%99%82%e5%8f%af%e7%94%a8emoji/