2. Put the soybeans in a large pot, at least in a container that can hold more than 5 times the original amount of beans. Soak in water for 20 hours.
3. Wash the soaked beans with water for 3 times.
4. After controlling the moisture, put it into the pot.
5, add water, the amount of water is about twice that of beans.
6, stew 1 hour or more, at this time, white foam will continue to appear, and you should turn it with a spoon until the water is basically invisible.
7, cooked beans, let cool, let cool for about one night.
8. Cut the beans into cubes. Let it cool on the chopping board for 2 days, and then wrap it tightly with food wrapping paper. Add several layers of newspaper bags outside, tie them with ropes and put them in the shade for fermentation.
9. Fermentation usually lasts 2-3 months. After complete fermentation, remove the outer packaging and brush it with a brush. You can break it, put it in a magnetic jar, add salt and cold boiled water, and stir it evenly once a day, and it will be finished in about 1 week.