This man is Zhang Zhongjing. It was he who invented jiaozi, our favorite food. At that time, he used his medical knowledge to make a diet recipe to keep out the cold, and jiaozi was in this recipe. Zhang Zhongjing was a physician in the late Eastern Han Dynasty. Because of his superb medical skills, he was honored as a medical saint. At that time, he applied dialectical thought to medical practice, which laid a certain foundation for clinical medicine of traditional Chinese medicine. It can be said that he has made great contributions to TCM and is the inheritor and founder of the soul of TCM. At that time, the official business was full, and when I was preparing to pack my bags and go home, I saw the people by the river shivering in the cold wind. At that time, because the weather was too cold, these people suffered a lot of frostbite, and some even lost their ears. Zhang Zhongjing was not only an official at that time, but also a doctor. So he was sad to see this situation and decided to help people study the prescription for typhoid fever. At that time, he decided to conquer the disease. After that, he began to turn all his attention to prescription science. At that time, he used his medical knowledge to successfully develop a diet prescription to resist colds. He named his prescription Xie Han Joule Soup. As for Joule, it was originally the prototype of jiaozi. It can be said that jiaozi is a kind of food invented by Zhang Zhongjing to help people resist cold weather. At that time, Zhang Zhongjing added jiaozi and jiaozi soup and distributed it to the poor. The poor man was feverish after drinking. Not only that, his ears and his body were on fire. In this way, people are no longer afraid of freezing their ears in cold winter. Because this kind of thing is very similar to the shape of an ear, Zhang Zhongjing called it Joule. Later, after people slowly and constantly changed, it was called jiaozi. In addition to this incident, Zhang Zhongjing also found many ancient pharmacies from the private sector, and compared the curative effects one by one. Finally, I wrote my whole life's research in Treatise on Febrile Diseases, which had a great influence on Chinese medicine.