z南城以南空巷旧梦z北城以北旧巷爱人
[z nán chéng yĭ nán kōng xiàng jiù mèng z bĕi chéng yĭ bĕi jiù xiàng ài rén]
South of South City and North of North City, the old alleyways have their respective old dreams and past loves. It describes nostalgic memories associated with old places and lost love.