Sour soup, also known as soup, prickly heat and beans (with slightly different methods), is a traditional special food that Manchu people often eat in summer. Popular in eastern Liaoning, southeastern Jilin, Heilongjiang and other places. It is a kind of coarse-grained staple food fermented by corn flour, and has become a green nutritious food for people to pursue health.

The soup is fragrant and slightly sour, smooth and refreshing, and it tastes very appetizing. A bowl of egg sauce fried with fresh leeks in early spring is more delicious.

Because the practices in different places are slightly different, there is no completely standard practice. If the subject really wants to learn to do it, online exercises are easy to find, so I won't go into details here.