- 挖空心思 wākōngxīnsi to rack one's brainsto rack one's brains; to think of every possible way to do something, often used in a negative sense to describe scheming or using calculated effort
- 空心菜 kōngxīncài water spinachwater spinach; a common leaf vegetable with hollow stems, also known as [[蕹菜|蕹菜|weng4 cai4]]
- 空心砖 kōngxīnzhuān hollow brickA lightweight brick with one or more holes in the center, used in construction for thermal insulation and soundproofing.
- 空心面 kōngxīnmiàn macaroni
- 空心币 kōngxīnbì hollow-handle spade coinearly hollow-handle bronze spade coin from the Spring and Autumn and early Warring States periods of the Eastern Zhou dynasty
- 空心拳 kōngxīnquán Baji Quan(alternate name) Baji Quan, a style of Chinese martial art known for explosive short-range power and elbow strikes; same as [[八极拳|八極拳|ba1 ji2 quan2]]
- 空心架子 kōngxīnjiàzi empty facadean empty form with no substance; something that is a mere formality or pretense; a hollow structure
- 空心球 kōngxīnqiú hollow balla ball that is hollow inside; a ball with a hollow core
- 空心大老官 kōngxīndàlǎoguān a show-off with no real substanceA person who pretends to be wealthy, important, or powerful but is actually a hollow sham; someone who puts on a grand front but lacks real ability or means.
- 空心墙 kōngxīnqiáng cavity wallhollow wall; a wall built with a gap between two layers of brick or inside and often filled with insulation
- 空心萝卜 kōngxīnluóbo hollow or superficial thingA person or thing that looks impressive on the outside but lacks real substance, value, or inner worth
- 空心儿 kōngxīnr hollowhollow; having nothing inside
