北城北诗南城南歌
[bĕi chéng bĕi shī nán chéng nán gē]
Roughly translated as 'Poems in the Northern City and Songs in the Southern City,' this nickname paints a vivid picture that suggests the contrast or complementary relationship between north (represented by poetry) and south (represented by songs). It might indicate different experiences or moods in one's past or idealized scenes of Chinese geography or literature and culture.