蔚蓝旧巷依然彼此擦肩而过
[yù lán jiù xiàng yī rán bĭ cĭ cā jiān ér guò]
Reflects nostalgia or missed encounters happening on old alleyways colored with a nostalgic hue ('azure alleys'). There's an implication of past acquaintances passing by without truly connecting, evoking bittersweet memories.