Sanjiu is the same as the finished wine on the market, but it is a large number of pure grain-brewed liquor without packaging.

In sensory identification of the authenticity and pros and cons of loose wine, we should mainly focus on the judgment and evaluation of the color, aroma and taste of wine. When visually observing the color of loose wine, we should first observe its transparency, turn it upside down, and check whether there are impurities sinking at the bottom, or whether there are suspended substances. , then pour it into the white background in the beaker and observe its color. The smell and taste of loose wine are the key indexes to evaluate the quality of loose wine, which should be carried out at room temperature and tasted immediately after opening the bottle.