White face painting used in traditional Chinese opera to represent a villainous or treacherous character; by extension, a treacherous or cunning person
the good cop
The gentle or kind person in a duo, specifically when contrasted with the "black face" 黑脸hēiliǎn
fair complexion
A pale or fair face; a naturally white skin tone on the face.
the bad cop
The harsh, severe, or villainous person in a duo, traditionally contrasted with the "red face" 红脸hóngliǎn