Many years ago, there was a rich man. The rich man had a young man named Du Kang. Du Kang was fourteen or fifteen years old, with thick eyebrows and big eyes, smart and pleasing to the eye. The rich man had many guests, and there were cars and sedan chairs coming and going all day long. When the guests came, the rich man always entertained them with wine and meat. Once they drank, it would take most of the day. Du Kang was always busy at the table, filtering wine and serving dishes. However, although he never let go of the wine pot every day, he never drank a sip of wine. He was afraid that the rich man would say that he was a "cat's mouth"! One day, a few more honest guests came to the rich man's house. Needless to say, the rich man treated them with a banquet. Du Kang was still busy with his old business: setting dishes and filtering wine. After three rounds of drinking, the guests were in high spirits, but the wine in the big wine jar was gone. This was really disappointing. Seeing this, the rich man thought: I can't let the guests leave unhappily no matter what I say. He asked Du Kang to go to the trough in the back village to fill the wine immediately. Du Kang picked up the wine gourd and went to the back village. He ran and ran, ran out of the village, ran past the small puddle on the road, ran past the small hill in front, and ran to the trough in the back village where he often came to fill the wine. He took out the wine gourd, filled it with wine, put it on his shoulder, and ran back. He ran and ran, ran out of the back village, ran past the small hill, and ran to the small puddle. Suddenly, a scent of wine hit his nose, fragrant and sweet, and he was immediately intoxicated by the aroma of wine. At this time, the wine gourd on Du Kang's shoulder also shook, and the wine inside gurgled. Du Kang couldn't run anymore, he took the wine gourd off his shoulder and carefully placed it on the ground, and sat down by the small puddle on the road. He thought: I fill, filter, and deliver wine every day, but I have never drunk wine. Today, why don't I drink a few sips and taste the wine? Strangely enough, when he thought of this, the wine gourd began to swing towards him. Seeing this, Du Kang grabbed the wine gourd and drank it without thinking twice. After a few gulps of dry wine, Du Kang was drunk. He was about to lie on the ground to take a nap, but suddenly he thought: The boss asked me to pour wine, and I drank so much. When I go back, they will say that I am a "cat's mouth". What should I do if I drink secretly on the way? Du Kang was very anxious when he thought of this. As the saying goes: in times of crisis, wisdom comes. He was so anxious that he came up with a solution. He pressed the wine gourd into the puddle, and the gourd was full. He quickly put the wine gourd on his shoulder and went back. The rich man and his guests were waiting anxiously, and saw Du Kang running back like flying, and his sweat soaked his small jacket. The old rich man still scolded him. Du Kang was too guilty to say anything back. As soon as he came back, he immediately poured the wine in the gourd into the wine pot and went to sift the wine. While sifting the wine, Du Kang was thinking: I added water to the wine, and when I drink it later, it won't taste good enough, and I will be scolded. Who knows, as soon as the wine is heated, a burst of fragrance will immediately float out of the wine pot, filling the whole yard with fragrance. When the guests drank the wine, their mouths were sticky and sweet. They nodded and said, "Good wine! Good wine!" The rich man was so happy that he asked Du Kang to carry the wine gourd to fill the wine every day. From then on, Du Kang had wine to drink. Every day when he came back from filling the wine, he would sit by the small puddle and drink for a while. Then, he pressed the wine gourd into the puddle and let it "gurgle" for a while. As time went by, Du Kang's capacity for alcohol grew. The amount of water added to the wine became more and more. The rich people said that the wine Du Kang poured was getting better and better. Du Kang, on the other hand, became more and more confused. He had to find out the truth. One day, the guests had all left. Du Kang picked up the wine gourd and went to the puddle again. He filled the wine gourd with water, sat on the ground next to it, and drank from the gourd. The more he drank, the more fragrant and sweeter it became. After a while, he was drunk. He fell down next to the puddle and took a long nap. After an unknown amount of time, Du Kang heard someone calling him in a daze: "Du Kang! Du Kang! Wake up quickly. This is a wine well. You can't drink too much of the wine in it." Du Kang opened his eyes and saw no one. However, he remembered the words "This is a wine well" deeply. After Du Kang knew about the wine well, he soon quit his job at the rich man's house, built a few thatched houses next to the puddle, and started his own winery. The water he used to make wine was all from that small puddle. When Du Kang's first jar of wine was ready, he invited his fellow villagers to drink it. Du Kang wine was thick and rich in flavor, with a refreshing aroma and a sweet taste. From then on, the reputation of Du Kang wine spread far and wide.