Honglongjing is a commercial street with flowing water from the east to the west in the south gate. It is rumored that a filial son was very filial to his mother. The mother was seriously ill and bedridden. filial son asked for medical treatment everywhere, and the condition never improved. One night, Xiaozi dreamed that an old man told him that there was a jade cabbage buried somewhere in the ancient city, which could cure all diseases; there were four red dragons guarding the jade cabbage, so that Xiaozi touched the red dragon with sincerity. After waking up, the dutiful son found the jade cabbage according to the instructions of the old man, and told the red dragon the whole thing. The dutiful son got the sympathy of the red dragon, picked the jade cabbage, and cured his mother's disease. After the news spread, the rich man wanted to occupy this magic jade cabbage, he posing as a dutiful son to Honglongjing, the greedy rich man wanted to take the whole cabbage away, and the mountain shook for a time, and the red dragon stepped on the greedy rich man. The story of Xiaozi and Honglongjing jade cabbage is passed down ten, ten, and the people in the city have come to fetch water to drink. Since then, the water of this well has been circulating, and the ancient city of Dali has also been flowing for thousands of years because of Honglongjing.