What does it mean for a boy to pat half his face?

Boys pat half their faces to show shyness.

Shyness means acting unnatural or smiling because of shyness, which is used to describe a shy and introverted person.

Shyness is mostly used for people who are prone to stage fright; Common in people who have communication difficulties or can't communicate with strangers normally; In order to hide the inner fear and anxiety, it will be the same.

Example: Xiao Ming is so shy that girls of his age blush. The source of shyness: The seventh time in A Dream of Red Mansions: "He is naturally shy and has never seen a big battle. His aunt was not angry when she saw it.