Literature Reference: 京兆归何处，章台空暮尘。—— 《再伤庞尹》 Where has the capital gone? Only the dusk dust remains in the Zhangtai. Source from 'Zai Shang Pang Yin'.
暮: Dusk, twilight, the evening of life.
尘: Dust and loess.
Meaning: Dust at dusk symbolizes the passage of time and the impermanence of life.