- 挖空心思 wākōngxīnsi rack brainsto rack one's brains; to exhaust every possible thought or scheme
- 空心面 kōngxīnmiàn macaroni
- 空心大老官 kōngxīndàlǎoguān pretenderA person who puts on airs of importance, wealth, or status but lacks actual substance or resources; a hollow big shot.
- 空心球 kōngxīnqiú hollow balla ball that has a hollow interior rather than being solid throughout
- 空心老大 kōngxīnlǎodà stuffed shirta pretentious and vacuous person
- 空心萝卜 kōngxīnluóbo good-for-nothinguseless person
- 空心墙 kōngxīnqiáng cavity wallcavity wall or hollow wall, constructed with an air space between two masonry layers for insulation