Thick wine is the product of deep processing of mash. Specifically, the mash is ground, boiled with water, sugar and osmanthus, and then filtered. The filtered wine slurry is Huang Gui thick wine. Fermented grains are better for your health, because they contain alcohol. Under sealed conditions, they can be stored at room temperature for a long time without deterioration. However, because sugar is added to strong wine, sugar will deteriorate and become sour in high temperature weather. In order to prolong the shelf life of industrial thick wine, preservatives and sweeteners are inevitably added. So mashed potatoes are healthier!