According to folklore, there is a widely circulated story about Zhang Liao who rewarded the three armies with braised pig's trotters and braised sheep's trotters after defeating Sun Quan at Feihe River. According to the elders, people in ancient Hefei especially liked to eat braised vegetables, especially braised pig's trotters. To this day, Hefei people still have the habit of chewing pig's trotters, which has spread throughout the country. At that time, there were many braised vegetables shops along the streets of Feidong County (now called Dianbu). It is said that after Zhang Liao's victory, he asked his generals in charge of logistics to rush to the shop overnight to purchase pig's trotters. The pig's trotters from Cao's family were especially delicious. Later, Cao Cao learned that since he happened to have the same surname, he curiously invited the owner of the Cao family to serve as the royal chef in his palace, specializing in braised pig's trotters and braised lamb's trotters. Cao Cao was full of praise after tasting it for the first time, saying: "I didn't expect this." It's unparalleled in the world that something made of skin and bones can become such a delicacy. Then he became very prosperous and was named "Cao's Hoof Ba". The imperial chef surnamed Cao was flattered and focused even more on cooking this delicacy for Master Cao.

After that, the popularity of Cao’s braised vegetable skills gradually decreased among the people. The skills were only passed down from generation to generation within the descendants of the Cao family. Mr. Cao, the advertising planner, vowed to carry forward the ancestral skills. On the basis of maintaining the original flavor of Cao's Hoofa, he specially hired a national first-class chef and combined it with the eating habits of people from all over the country. After thousands of experiments, he repeatedly adjusted the formula. The previous twenty-six kinds of Chinese herbal medicine ingredients were upgraded to forty-six kinds and it was guaranteed not to add any colorings and preservatives. Combining the characters and allusions in the culture of the Three Kingdoms, Cao's Hoof Ba as the signature dish, Liu Bei's Old Hen, Guan Yu's The "Stewed Three Kingdoms" series of braised food restaurants specializes in chicken wings, Zhangfei pig head meat, etc.

At present, there are more than 700 chain stores across the country. You, Cao Cao, will be very pleased to see this scene. Cao's culture will have a long history. This is something that is unknown to outsiders in the Three Kingdoms