繁华尽落空城伤烟花尽冷流年散
[fán huá jĭn luò kōng chéng shāng yān huā jĭn lĕng liú nián sàn]
A poetic expression which loosely translates to 'After the glory fades, the empty city grieves, cold fireworks disperse in time gone by.' It captures melancholic reflection upon lost beauty, fleeting moments of happiness, and how all extravagant splendor inevitably fades away over time.