What does WeChat yellow face expression pack mean?

The expressions of WeChat and QQ are roughly the same. Long press the expression will display a dynamic picture, and you will know the general meaning according to its action.

Specific as shown in the figure below, including the meaning of all expressions.

The design of QQ expression represents the most primitive emotional appeal of human beings. For example, anger is anger, smile is smile, embarrassment is embarrassment, and there is no other interference in the expression. Simply put, the design of QQ emoticons is a very pure emotional expression-true, simple and practical.