Ingredients: soybeans.

Accessories: soy sauce, bean paste, salt.

1. Prepare soybeans, wash them and soak them for about eight hours in advance.

2. Put the cooked soybeans into the pot, cook until the water in the pot is completely evaporated, cover the pot, and simmer for eight to nine hours.

3. Pour the braised soybeans into a blender, and stir one catty of soybeans into fine powder with three or two cold waters.

4. Put the stirred bean powder into a water-free and oil-free jar, and add one spoonful of soy sauce and two spoonfuls of bean paste.

5. Finally, sprinkle with salt, cover with two layers of steamer cloth and a layer of handkerchief according to the ratio of one catty of soybeans to half a catty of salt, fix it with a rubber band, put it on the balcony, and ferment for about 20 days.