When Gonghu of Lu and Qi Ying of Zhao fell ill, they went to see the genius doctor Bian Que for diagnosis and treatment. Under Bian Que's meticulous care, their illnesses recovered in no time. However, Bian Que said to Gong Hu and Qi Ying, "The diseases you both sought to treat in the past were caused by the intrusion of pathogens from outside the body into the internal organs, so only medicine and acupuncture can solve the problem. God, I found out that there is still a disease lurking in you. It was brought out of your mother's womb and grew along with your body's development. This disease is very dangerous. I would like to treat you again, how about it?" Gong Hu and Qi Ying replied, "We want to hear about the symptoms of this disease, and then make a decision."

Therefore, Bian Que first said to Gong Hu: "You have lofty ambitions, and you are good at thinking about problems. You can have many ways to deal with problems, but unfortunately, your temperament is relatively weak, and you are often indecisive, hesitant, and lost at critical moments. Good opportunity." Then, he turned to Qi Ying: "What about you? It's the exact opposite of Gong Hu. You lack long-term plans for the future, your thoughts are relatively simple, but your temperament is very strong, and you don't think much about others, but you like to act arbitrarily. Finally, Bian Que said to the two of them: "Now if I exchange your hearts, you will all be perfect." After listening to Bian Que's analysis, Gong Hu and Qi Ying were both willing to undergo a heart transplant. So, Bian Que made them both drink a kind of narcotic wine, causing them to fall into a coma and not wake up for three days. During this time, Bian Que opened their chests, took out their hearts, and exchanged them. After the operation, the magic medicine was applied to the wound, and when they recovered, they were still as healthy and strong as before the operation. After they said goodbye to Bian Que together, they went home separately.

However, because the hearts have been exchanged, Gong Hu returned to Qi Ying's house, and Qi Ying returned to Gong Hu's house. The wives and children of the two families did not know the people who came home, so they all quarreled. Gong Hu and Qi Ying couldn't think of it, so they had to ask Bian Que to explain. Bian Que told the two families the whole story, so that the quarrel could be put to rest. This fable is borrowing the name of the genius doctor Bian Que, using the metaphor of heart-changing, to show that everyone has their own strengths and weaknesses. As long as a person is good at taking others' strengths and making up for his own weaknesses, he will gradually become perfect.