凉城小街姑娘未离古城小巷少年已去
[liáng chéng xiăo jiē gū niáng wèi lí gŭ chéng xiăo xiàng shăo nián yĭ qù]
Reflects the nostalgia for youthful days gone by, set against the background of narrow streets and lanes in an ancient town. The girl hasn’t left, while the boy has gone, symbolizing separation.