流城空葬死去旳时光少年
[liú chéng kōng zàng sĭ qù dì shí guāng shăo nián]
Translating roughly to 'In this flowing city time is buried, and youthful years have died away,' it evokes the theme of the fleeting nature of youth and how cities change over time, burying precious memories and youthful vigor.