Should again唔上盖盖盖好，或者是放在太阳下爆晒，或者是盖上电褥子升温。

If you can't pull the silk to, there may be a stray bacterial infiltration, tempeh to black beans or soybeans as the main raw material, the use of Trichoderma, Aspergillus, or bacterial protease, the decomposition of soy protein, to a certain extent, add salt, add wine, drying and other methods to inhibit enzyme vitality, to slow down the process of fermentation and made.

1. Prepare a waterless and oil-free basket for the beans, and cover the beans with a steaming cloth after they cool.

2. Select the right amount of soybeans, wash and clean into the pot with water to cook, high heat to boil and then low heat to cook for about 30 minutes, turn off the fire. Beans fermentation for three days.

3. Beans natural fermentation for three days, pry open with chopsticks can see the pulling of the wire, you can also smell the flavor.

General bean products fermentation, control of anaerobic environment, so that the protein denaturation and fermentation into amino acids, if the ambient temperature is too high, it is appropriate to further decomposition of amino acids into carbon dioxide, ammonia and so on.

If the ammonia odor is not heavy, can be placed in a cool, dry, ventilated place, if it is very heavy, it is best not to eat. Because of the production of ammonia, it can also produce nitrates and nitrites, which are harmful.