"The world of mortals" is a Chinese character, and its pinyin is hóngchén, which is a common name and refers to the secular meaning. The second refers to the bustling secular life in this world; Three refers to the flying dust in the downtown area, which describes prosperity and also refers to lively places; Four fingers in the world; Five fingers secular; The original meaning of the world of mortals in ancient times refers to a bustling city. The poem comes from Xi Du Fu written by Ban Gu, a writer and historian in the Eastern Han Dynasty. The dirt road in the past, the dust raised after the chariots and horses, is a metaphor for the road to fame and fortune.