https://blog.wongcw.com/2021/02/17/ios-14-5-%e6%96%b0%e5%a2%9e%e8%b6%85%e9%81%8e200-%e5%80%8b%e5%85%a8%e6%96%b0emoji-%e8%a1%a8%e6%83%85/