南城以北依旧美北海以南依旧蓝
[nán chéng yĭ bĕi yī jiù mĕi bĕi hăi yĭ nán yī jiù lán]
'North of South City remains beautiful, south of North Sea remains blue' implies a beauty or quality that persists despite time or distance, symbolizing timeless beauty or scenery.