原来一切只是回忆原来一切幸福已逝
[yuán lái yī qiè zhĭ shì huí yì yuán lái yī qiè xìng fú yĭ shì]
'It Turns Out Everything Was Just Memory, and All Happiness Has Gone Away,' this indicates profound nostalgia coupled with grief, acknowledging things cannot return to how they were once upon a time.