These are expressions composed of special symbols. Let me give you some. You can put them in the nickname of YY personal information.

ω?

づ﹏ど

( ? )

┭┮﹏┭┮

?

(づ￣3￣)づ

●﹏●〣

(? "? )

Line by line, Baidu can't see it. You can copy it directly, put it in YY chat input field, and you can see it.

You usually see your favorite YY name, just hold down his YY name and drag it to the YY chat input field, you can copy it again, and then paste it directly into the nickname in YY personal information.