雨后人去楼也空
[yŭ hòu rén qù lóu yĕ kōng]
'Empty building after people leave in the rain' paints an image of loneliness, nostalgia or a scene post a dramatic parting moment, often used to evoke feelings of melancholy. The departure may represent not only the actual physical disappearance but also symbolic meaning, such as a breakup or farewell to the past.