北城以北半度温凉南城以南温暖如初
[bĕi chéng yĭ bĕi bàn dù wēn liáng nán chéng yĭ nán wēn nuăn rú chū]
Roughly means 'To the north of the North City, it's slightly cool, but south of the South City, it feels warm as before.' These poetic place-based metaphors might refer to changes in the narrator's life - perhaps their experiences vary greatly from one part of life (or city) to another, feeling different emotions at each juncture. A change in environment brings about a difference in mood or perception.