鱼是深海一缕未亡魂云是天空一抹不灭忆
[yú shì shēn hăi yī lǚ wèi wáng hún yún shì tiān kōng yī mŏ bù miè yì]
It roughly means 'The fish is an undying soul lingering in the deep sea; the cloud is an unforgettable memory across the sky'. It reflects romantic or melancholic emotions tied to unfulfilled longings or memories spanning great spaces like the sea and sky.