What is the origin of the idiom "save face" and when to use it?

The phrase "save face" originated in East Asia, particularly in China and Japan, where the concept of "face" refers to one's social standing, reputation, and dignity. In these cultures, losing face is seen as a serious matter, and people will often try hard to avoid it. The phrase was later adopted into English through diplomatic and trade relations with East Asia. The idiom is used to describe the act of avoiding public embarrassment or humiliation by taking actions that preserve one's dignity, reputation, or honor. It implies that someone has made a mistake or is in an awkward or difficult situation, and they are attempting to minimize the damage to their reputation or social standing.