人面不知何处去桃花依旧笑春风
[rén miàn bù zhī hé chŭ qù táo huā yī jiù xiào chūn fēng]
A poetic way to recall memories while lamenting about people’s disappearance or changes through referencing classic Chinese poem lines 'people gone away but the peach flowers are still here to smile with spring wind'. It implies a sense of nostalgia and melancholy over lost times and places.