空中樓閣

Simplified: 空中楼阁

kōngzhōnglóugé ㄎㄨㄥ ㄓㄨㄥ ㄌㄡˊ ㄍㄜˊ

    • pavilion in the air (idiom) unrealistic Utopian construction
    • castles in Spain
    • imaginary future plans

Character by character

Saying俗语俗語

Idiom惯用语 · In everyday use

Literally
a pavilion in mid-air
Meaning
A fine-sounding theory, plan or idea that has no basis and can't be realised. Close to 'castle in the air'.

Sources