A Foundational Chore: Like in many cultures, sweeping is a basic household responsibility. In China, it's often one of the first chores taught to children, instilling values of diligence, cleanliness, and contributing to the family.
Metaphor for Ruin: The act of “sweeping” can be extended metaphorically to mean complete removal or destruction. A powerful idiom is 威信扫地 (wēixìn sǎo dì), which means “for one's prestige and reputation to be swept to the ground”—utterly ruined. Another is 扫地出门 (sǎo dì chū mén), meaning “to be swept out the door,” which describes being kicked out of one's home or a group with absolutely nothing.
Zen and Purification: In Chan (Zen) Buddhism, which has deep roots in China, the simple act of sweeping is a profound form of moving meditation. It symbolizes clearing the mind of mental “dust”—impurities like greed, anger, and ignorance. The famous “sweeping monk” (扫地僧, sǎo dì sēng) in martial arts fiction is a popular trope representing a hidden master whose immense power is veiled by a humble, menial role.
Comparison to Western Culture: In the West, “sweeping the floor” is almost exclusively a literal, mundane task. While we might say “a clean sweep” for a total victory, the act of sweeping itself isn't used as a powerful metaphor for personal ruin or as a recognized spiritual practice in the same way it is in Chinese culture.