The masks use different colors to represent different meanings. White represents... what kind of expression is used?

The various colors of traditional Chinese opera facial makeup represent the following meanings:

Red: represents loyal and heroic characters, such as Huang Feihu and Guan Yu.

Blue: represents a strong, brave, and calculating character, such as Dou Erdun.

Black: Represents integrity, selflessness, and upright characters, such as Bao Gong.

White: represents the image of sinister, suspicious, high-spirited and solemn characters. Such as: Cao Cao.

Green: represents a tenacious and violent character. Such as: Wu Tianqiu.

Yellow: represents brave and fierce characters, such as Yuwen Chengdu.

Purple: represents a person who is upright, steady and calm.

Gold and silver: represent various images of gods and monsters.