In memory of Zhang Zhongjing, a "medical sage", he served as a magistrate in Changsha in the Eastern Han Dynasty and made house calls in the lobby to practice medicine. Later, he resolutely resigned and went back to his hometown to treat his neighbors. When he got home, it was already winter. When he saw that the villagers on both sides of the Baihe River were sallow and emaciated, and many people's ears were frozen rotten, he asked his disciples to set up a medical shed and cauldron in Dongguan, Nanyang, and gave their "charming ears" to the winter solstice.

He cooked mutton and some herbs to dispel the cold in a pot, then took out the mutton and chopped the medicine to make ear-shaped Joules and bread. After cooking, he distributed two Joules and a big bowl of broth to everyone who came to ask for medicine. People ate Joule and drank Quhan decoction, and they were all hot. The ears with fever and frostbite are cured. Later generations knew what Joule looked like and made it into food, also called jiaozi or flat food. When they eat jiaozi on the solstice of winter, they never forget the kindness of Zhang Zhongjing in the decoction for dispelling cold and joule.

Zhang Zhongjing, a native of Xi, Nanyang, wrote Treatise on Febrile Diseases, which is the representative work of doctors. Quhanjoule decoction has been regarded as a classic by doctors in past dynasties. Zhang Zhongjing has a famous saying: "if you advance, you will survive, and if you retreat, you will save the people;" You can't be a good doctor, but you are also a good doctor. "