The line " There's a mine at home " originated from a plot in the Chinese online novel " Battle Through the Heavens." In the novel, Xiao Yan's father, Xiao Yu Feng, was a wealthy member of a large clan. During his training, he obtained a precious medicinal ingredient called the 'Heavenly Silkworm Potato' and thus became unusually powerful. Xiao Yan had always emphasized his identity and wealth during his growth and had made the family's mine one of his proudest possessions. However, this usage was not common in real life. In more cases, it referred to having a large amount of wealth and resources.