pào yǐng
lit. soap bubble
pie in the sky
nothing
huà wéi pào yǐng
lit. to turn into soap bubbles
to come to nothing (idiom)
mèng huàn pào yǐng
lit. dreams and visions in a bubble (idiom); fig. the illusory nature of the world in Buddhism
illusion
pipe dream
zhōng chéng pào yǐng
finally a soap bubble (idiom); grandiose plans that end up with nothing
pie in the sky