北城以北深海未眠南城以南夜色未央
[bĕi chéng yĭ bĕi shēn hăi wèi mián nán chéng yĭ nán yè sè wèi yāng]
'To the north of the North City where the ocean is still awake, while to the south of the South City remains lit up late into night.' Such vivid images might imply his living habits like burning the midnight oil or lifestyle between metropolis and remote places; moreover it evokes the feeling of solitude and restlessness