In the rich text editor:
@Zhizhzhe
In a comment:
[Zhizhzhe](https://chowlings.com/user/Zhizhzhe)
For Names and Avatars:
In the rich text editor:
%Zhizhzhe
In a comment:
[](https://chowlings.com/user/Zhizhzhe) [Zhizhzhe](https://chowlings.com/user/Zhizhzhe)