1. The principle of making fermented grains is similar to that of fermented grains, except that the raw material is wheat. After steamed wheat is fermented with distiller's yeast and mixed with cold water, there will be delicious preserves, which not only keeps the original flavor of wheat, but also tastes sweet and sour.

2. The preparation method of rice wine is to take broken grains as raw materials, enrich microorganisms to make koji, and then use koji to promote more saccharification and fermentation of grains to make wine. In addition to dominant yeasts and sweet wine medicinal bacteria, microorganisms in koji also contain a large number of miscellaneous bacteria. The rice wine made is too strong but not sweet enough, and the remaining wine is not sweet enough, even sour and smelly, and the health care effect of rice wine is not outstanding.