南城以念北城人
[nán chéng yĭ niàn bĕi chéng rén]
'Remembering people in North city while living in South' indicates someone who feels distant or disconnected due to geographic separations or social status gaps. In modern Chinese context, it could also refer to missing loved ones, such as family members living apart due to studies or work, emphasizing deep-seated emotions brought about by distance.