思念延不到永远怀念回不到从前
[sī niàn yán bù dào yŏng yuăn huái niàn huí bù dào cóng qián]
'Si Nian Yan Bu Dao Yong Yuan Huan Nian Hui Bu Dao Cong Qian' means 'missing stretches not until forever, reminiscence cannot return to the past,' expressing the sadness that nostalgia and memories cannot last forever or be revisited in full glory. It touches on themes of impermanence and yearning.