Jiang Tong, an author of Jin Dynasty, wrote in his ¡¶Jiu Gao ¡· (a book giving orders and recommendations ) , "Brewing of alcoholic drinks were originated in the primitive times possibly by Di Yi or maybe by Du Kong. But in fact some food left in a bowl was then placed aside without any care for a long time, it then fermented itself and our ancestors found it fragrant. They imitated the material method, and then invented the brewing of alcoholic drinks. That was how brewing of alcoholic drinks was invented. " That our ancestors suggested making alcoholic drinks by itself brewing quite meets scientific laws. Jiang Tong was the first one who presented the opinion that grains itself fermented and changed into the alcoholic drink. Modern science explained the secret. The starch of remaining food under the action of enzyme secreted by microorganism of nature is gradually divided into sugar and alcohol, changing into flagrantly -smelt alcoholic drink. During the primitive period, the wild fruits collected by our ancestors as food contained a high percent of sugar, they were very easy to ferment and change into alcoholic drinks themselves, and unnecessary to liquidize and saccharificate.
During the Old-Stone Age, our ancestors made a living by collecting and hunting. Fruits contained much sugar and other substances which, under the action of microorganism, were easy to ferment and change into pleasant and delicious fruit wine, and the animal's milk contains protein and lactose which are also very easy to ferment into the alcoholic drink, our ancestors who lived by hunting might happen to obtain the milk alcoholic drink from remaining milk. In ¡¶Huang Di Nie Jing ¡· there is a record of a kind of alcoholic drink named "Li Lou", which is the oldest record about milk alcoholic drink in China. According to the ancient legends and reference based on the brewing principles, the earliest alcoholic drinks the mankind had an idea to brew should be fruit wine and milk alcoholic drink, for fruits and animals' milk were fairly easy to ferment into alcoholic drinks, which only needed rather simple brewing techniques.