成语故事：空中楼阁 A Castle In The Air

空中楼阁

kōng zhōng lóu gé

A Castle In The Air

空 means the sky or the air. 中 is in the middle of. 楼 is a building, 阁 means a cabinet or chamber. So 空中楼阁 means the house built in the sky or a castle in the air. It's a way of criticizing someone's daydreams or impractical plans.

Literal meaning:a mansion in the air

Explanation: realm of fancy; illusion

E.g

他的提议只是空中楼阁。

Tā de tí yì zhǐ shì kōng zhōng lóu gé。

His proposal was nothing but a house of cards.