北城荒凉旧人难忘
[bĕi chéng huāng liáng jiù rén nán wàng]
It reflects the user's emotional寄托 (emotion寄托placement). It refers to the situation where an old friend is unforgettable against the backdrop of loneliness in the northern city, which often appears desolate in literature, emphasizing the depth and lingering impact of memories or feelings towards certain people.