空城一梦
[kōng chéng yī mèng]
Literally meaning a dream of an empty city, this nickname is based on traditional Chinese opera themes where emperors or heroes have abandoned their thrones/cities. It usually indicates a feeling of desolation or loneliness, evoking melancholy over what once thrived and then disappeared suddenly. There’s also a popular song named <Empty City> whose main character lived in the ruins while mourning the lost love and prosperity.