别再来我梦里换我空欢喜
[bié zài lái wŏ mèng lĭ huàn wŏ kōng huān xĭ]
"Don't come back into my dreams just to leave me with unfulfilled happiness." It describes a yearning for something beautiful (perhaps love or a certain person) only to be left feeling bittersweet afterward—a momentary joy leading to eventual longing and disappointment.