北城以北替谁忧伤南城以南为谁绽放
[bĕi chéng yĭ bĕi tì shéi yōu shāng nán chéng yĭ nán wéi shéi zhàn fàng]
North of the North City, Grieving for Whom; South of the South City, Blooming for Whom suggests feeling sad for one person while being happy for another, often used to express complex emotions like unreciprocated love and separation anxiety.