Xu Ning, who was ruined by his former friends, got a bronze door in his ancestral house that could travel to other worlds, which opened the way for him to make a fortune as a traitor in both worlds.
Wine bottles were exchanged for ginseng, mirrors were exchanged for cordyceps, and medicines were exchanged for gold... He became the richest man in the world in modern society, and in another world he was as rich as any other country.
It is said that men become bad when they have money. Xu Ning thinks he is not bad, just a little philanthropic.