Roasted tofu is a famous snack in Kunming night market. Choose high-quality shiping tofu, cook it with charcoal fire, season it, the skin is yellow and crisp, and the heart is white and tender. At night, the streets and lanes of Kunming are full of fire and fragrance, forming a folk scene. Roasted tofu is a flavor snack in southern Yunnan, each piece weighs about 20 grams. Using high-quality soybeans as raw materials, it is made by more than ten processes, such as grinding beans, hulling, soaking, pulping, boiling, filtering, forming, filtering and fermentation. Among them, fermentation process is the key. If the fermentation time is short, tofu will become hard and bitter, and if it takes too long, it will go bad. The so-called roasted tofu is actually a kind of small stinky tofu that smells bad and tastes good. Many nutrients that are not easily digested and absorbed by human body after fermentation are decomposed by yeast or fungi, which is beneficial to the needs of human body.