Supplement:
Bean paste is a fermented reddish-brown condiment brewed by the interaction of various microorganisms, which produces complex biochemical reactions. It is made of broad beans (broad beans are used in South China and Southwest China, while soybeans are mostly used in Central China and East China), sake koji (a bacterium used for fermentation), salt and soy sauce. At the same time, according to the different habits of consumers, sesame oil, soybean oil, monosodium glutamate, pepper and other raw materials were prepared in the production of bean paste, which increased the variety of bean paste.