Speaking of the origin of hot and sour powder, such allusions are widely circulated. It can be traced back to the Three Kingdoms period. At that time, after Liu Bei, Guan Yu and Zhang Fei became sworn friends in Taoyuan during the Three Kingdoms period, the owner of Taoyuan specially cooked a meal for them, and chose the popular sweet potato powder as the main ingredient at that time, which implied that the friendship of these three people was as long as this vermicelli, and also added very spicy pepper, old altar sauerkraut, brown sugar and Huang Lian. Liu Bei means to let the three people know that they are not afraid of ups and downs. Later generations gradually changed it to "hot and sour powder" because of its sour and spicy taste. Chongqing hot and sour powder is characterized by "hemp, spicy, fresh, fragrant, sour and oily but not greasy". [ 1]?