It was just to please Duke Heng of Qi. The story of Yi Ya Panzi is despised by many people. Qi Henggong just sighed: "I have eaten delicious food all over the world, but it is a pity that I have never tasted human flesh." ?Most people would think that Qi Henggong just sighed a few words to show off that he had tasted all the delicacies in the world, but Yi Ya remembered this sentence.

Yi Ya, a chef, was the first private chef in history. He is good at cooking and knows how to blend the flavors of dishes. Yi Ya became a minister around Duke Heng of Qi because of his good cooking skills. If such a person is a good cook, there will be one more good chef in the world. But Yi Ya was not willing to be just a chef, and he tried his best to please Qi Henggong. He usually served Qi Henggong with delicious food. After hearing Qi Henggong complaining that he had never eaten human flesh, he actually tried to get human flesh.

The human flesh given to Duke Heng of Qi must not be an older person or a death row prisoner, until Yi Ya saw his 4-year-old son at home. In the belief that Duke Heng of Qi should enjoy the best, Yi Ya killed his own son and cooked it into a pot of tender broth. Duke Heng of Qi ate the broth prepared by Yi Ya at the banquet. He felt it was very novel. After questioning, he found out that it was the meat of Yi Ya's son. Qi Henggong did not expect that he would actually eat human flesh. Although it was very uncomfortable, he was grateful for Yi Ya's loyalty to him, so he trusted Yi Ya even more.

Yi Ya killed his own son to satisfy Duke Heng of Qi’s desire to eat human flesh. This was not loyalty and only allowed people to see his unscrupulousness and greed. Sacrificing your own son to please your superiors is definitely not a sign of loyalty. Guan Zhong once said to Qi Henggong: "Yi Ya killed his own son to please you. It is really unkind. Don't reuse him." ?Guan Zhong could also see that Yi Ya was not a kind person. In fact, he was hinting to Qi Henggong that Yi Ya could kill even his own children, let alone a monarch with no relatives or relatives? But Qi Henggong disagreed and still insisted that Yi Ya was willing to kill his son to make soup for him, and he was a loyal person.

Yi Ya's murder of his son indeed paved the way for him to be promoted in the officialdom. Qi Henggong reused Yi Ya, and Yi Ya became the person who controlled the government for a while. But after Duke Heng of Qi fell seriously ill, it was Yi Ya who teamed up with other powerful officials to starve Duke Heng of Qi to death. Qi Henggong regretted his mistake before his death, but it was to no avail.