北城以北爱未荒南城以南爱未凉
[bĕi chéng yĭ bĕi ài wèi huāng nán chéng yĭ nán ài wèi liáng]
The phrase means that north of the city, love has not been forgotten, and south of the city, love has not cooled down, conveying an unyielding or everlasting love sentiment across different places.