短相思兮无穷极长相思兮长相忆
[duăn xiāng sī xī wú qióng jí zhăng xiāng sī xī zhăng xiāng yì]
'Short longing endless, long longing eternal'. It's derived from an ancient poem 'Li Sao', reflecting a profound longing and yearning for someone or something that persists regardless of time. This kind of unending affection leaves an indelible impression in one's heart.