那个熟悉的面孔那个熟悉的背影
[nèi gè shú xī de miàn kŏng nèi gè shú xī de bèi yĭng]
Describing 'the familiar face and familiar back view' evokes nostalgia and yearning for someone deeply missed. It highlights the significance of a person who once held importance in the user’s life but may no longer be present.