Actually, Wen Wen's research on microexpressions was merely skimming the surface, Observant but not delved into any detailed understanding.
Because, after learning about microexpressions and body language, the first thing he did was train himself to not reveal his intentions through subtle movements.
For instance, when Wen Wen casually conversed with someone, he generally stood with his feet pointed inward, so others could not judge his intent to stay or leave based on the direction of his toes.
The same facial expression could be meant for hacking someone to pieces or for snatching a lollipop from a child.
In any case, unless his emotions were out of control, most of Wen Wen's microexpressions and body movements were meaningless.
Wen Wen believed that an opponent complex enough to require him to observe microexpressions must have undergone similar training, and those less complex didn't necessitate his observation of microexpressions at all.
