北城以北深海未眠南城以南呓语未梦
[bĕi chéng yĭ bĕi shēn hăi wèi mián nán chéng yĭ nán yì yŭ wèi mèng]
'North of the northern city, the deep sea sleeps not; south of the southern city, whispers don't dream.' It conveys a romantic image, painting contrasting scenes - the restless depth of feelings (north) and the quiet mutterings that are too insignificant to enter the world of dreams (south).