乱了夏末蓝了海伤了秋冬白了城
[luàn le xià mò lán le hăi shāng le qiū dōng bái le chéng]
Roughly translated to 'Disorder in late summer turned blue the seas; injury in winter whitened the cities'. It paints poetic pictures using seasonal colors and events to metaphorically convey disorientation, sorrow, and changes over the course of seasons, highlighting the passage of time.