What do you mean by worldly ghost man?

Ghost is a worldly online novel, which mainly tells the story of Ranbo, a fortune-teller in a small town in the south of the Yangtze River in the late Qing Dynasty, who helped others solve problems and gain people's hearts. There are a lot of uncommon words in Ghost, such as "beggar" and "Erba family", which requires readers to have a certain reading ability of ancient Chinese and a reserve of historical knowledge.