溺海而亡尸体却修人鱼身
[nì hăi ér wáng shī tĭ què xiū rén yú shēn]
The phrase translates to 'died drowning in the sea, but my body transformed into a mermaid'. It's a poetic and tragic way to describe longing for a fantastical existence or an escape from the harshness of real life through transformation into an imaginative form such as a mermaid.