暖了夏天蓝了海凉了秋天黄了叶
[nuăn le xià tiān lán le hăi liáng le qiū tiān huáng le yè]
A poetic expression translating to 'Summertime warmth turns the sea blue, while autumn brings cooling weather, turning leaves yellow', portraying nature's cycles through seasons, reflecting changes and transformation in life.