A century-old Banu soup, a folk secret system, has been almost lost after years of vicissitudes; However, how can its fragrance, fresh to the fragrance of cotton, be blocked by time and space? A man surnamed Xin from Yunnan went to Sichuan to pull optical fiber to support his family and did not return for three years. His mother wants to go west, and his wife looks for a husband to go to Sichuan; Several kinds of wild mushrooms in Yunnan were collected before the trip, and the local chicken was injected into the spring water in the mountain and boiled in the urn for 7749 hours, which eventually became a delicious soup. Xin walked into Sichuan with an earthen urn on his back. "It is difficult to get through the road, and it is difficult to go to the sky." After years of suffering, I finally couldn't find my husband and vomited blood and died. The tracker buried it by the river and opened the earthen urn; Suddenly, the fresh fragrance permeates the banks of the Sichuan River, which is remote and ethereal, just like nature. Judging from it, the soup is dark, brown and bright; Drink it, the entrance is fresh and delicious; After drinking, the spirit is light and refreshing, and the mouth is fragrant. Trackers call it "Banu Tang".