https://segmentfault.com/a/1190000007594620
http://cenalulu.github.io/linux/character-encoding/
https://apps.timwhitlock.info/emoji/tables/unicode#block-6c-other-additional-symbols
http://www.ruanyifeng.com/blog/2017/04/emoji.html
原文：https://www.cnblogs.com/xuxm2007/p/8966646.html