旧夏天吹散向日葵向日葵开过旧夏天
[jiù xià tiān chuī sàn xiàng rì kuí xiàng rì kuí kāi guò jiù xià tiān]
An evocative expression that links memories of past summer and sunflowers, symbolizing nostalgia and cyclical nature of memories recurring through time in seasons and events such as blooming.