南城以南暖如初北海以北半微凉
[nán chéng yĭ nán nuăn rú chū bĕi hăi yĭ bĕi bàn wēi liáng]
'South of South City is as warm as before; north of Beihai feels slightly cool' contrasts two geographical directions, emphasizing changes yet consistency—warmer south evokes memories of warmth, while cooler north reflects on current feelings.