城空无人心空彻夜凉
[chéng kōng wú rén xīn kōng chè yè liáng]
The phrase 城空无人心空彻夜凉 reflects an atmosphere of solitude where not only the city stands vacant but also describes an internal emptiness within oneself felt throughout the long cool night. It conveys a sense of loneliness, sadness and desolation both outwardly and inwardly.