Second, in the Song Dynasty, it was called "public service". The seventh time in the Water Margin: "It turns out that the public in the Song Dynasty was called Duangong".
Third, end workers, also known as Shen Han, refer to people who engaged in superstitious activities and practiced witchcraft in the old society, generally referring to men. Master teacher catches ghosts. (Taoist Dojo; Fairy mother-in-law invited ghosts and spirits (commonly known as jumping gods); Yin and Yang are in charge of geomantic omen and auspicious choices. (that is, Mr. Feng Shui). )