In the rich text editor:
@huyful
In a comment:
[huyful](https://chowlings.com/user/huyful)
For Names and Avatars:
In the rich text editor:
%huyful
In a comment:
[![huyful's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/huyful) [huyful](https://chowlings.com/user/huyful)