再美的记忆也只是曾经再美的回忆也只是过去
[zài mĕi de jì yì yĕ zhĭ shì céng jīng zài mĕi de huí yì yĕ zhĭ shì guò qù]
No matter how beautiful the memory, it's still from the past. It signifies nostalgia with acceptance - acknowledging fond past memories while embracing current reality, implying a sense of moving on from past glory