2. Cooked dough can be stored in the refrigerator and frozen. If the dough is kept at room temperature, a large number of bacteria will breed on the surface of the dough, which will deteriorate the dough and produce harmful substances, which will be harmful to the body after eating.

3. Fermented dough (bio-fermented dough) is a dough made by adding proper amount of yeast and water to flour, kneading evenly and fermenting at a suitable temperature. Bio-fermented dough is suitable for making steamed bread, flower rolls, big bags and so on. The product has expanded volume, full shape, soft taste and rich nutrition.