The winter solstice is a great opportunity for health preservation, mainly because "Qi begins at the winter solstice". Because from the beginning of winter, life activities began to turn from prosperity to decline, from dynamic to static. At this time, scientific health preservation helps to ensure vigorous energy and prevent premature aging, so as to achieve the purpose of prolonging life. During the winter solstice, the diet should be diversified, and the grains, fruits, meat and vegetables should be reasonably matched, and high-calcium foods should be appropriately selected. Food should be light, not thick, greasy and salty food. In winter, the yang is declining, and the spleen likes warm and hates cold, so it is appropriate to eat warm products to protect the spleen and kidney. Eating should be small and frequent. We should pay attention to "three more and three less", that is, there are more protein, vitamins and cellulose, and less sugar, fat and salt. Wonton noodles used to be called "winter solstice wonton noodles in summer solstice" in old Beijing. According to legend, during the Han Dynasty, the Xiongnu in the north often harassed the frontier, and the people were restless. At that time, there were two leaders of Hun tribe and Tun tribe, which were very cruel. The people hated it, so they wrapped it into a corner with meat stuffing and called it "wonton" with the sound of "muddy" and "tun". Hate to eat, and seek to calm the war and live a peaceful life. Because wonton was originally made on the winter solstice, every household eats wonton on the winter solstice. The custom of eating dog meat on the winter solstice is said to have started in the Han Dynasty. According to legend, Liu Bang, Emperor Gaozu, ate dog meat cooked by Fan Kuai on the winter solstice, which made him feel particularly delicious and full of praise. Since then, the custom of eating dog meat on the winter solstice has been formed among the people. Nowadays, people eat dog meat, mutton and various nourishing foods on the winter solstice in order to have a good omen for the coming year. Eating jiaozi's annual winter solstice, jiaozi is an essential holiday meal for rich and poor. As the saying goes, "On October 1st, when the winter solstice comes, every family eats dumplings." This custom was left in memory of Zhang Zhongjing, a "medical sage", who gave up medicine on the winter solstice. Eating jiaozi on the Winter Solstice Zhang Zhongjing is a native of Xi 'e, Nanyang. He wrote Treatise on Exogenous Febrile Diseases, which is a masterpiece of doctors. The decoction for dispelling cold and jiao 'er has been regarded as a classic by doctors in past dynasties. Zhang Zhongjing has a famous saying: "If you advance, you will save the world; if you retreat, you will save the people;" You can't be a good doctor, but also a good doctor. " In the Eastern Han Dynasty, he served as the prefect of Changsha, visiting the sick and applying medicine, and practicing medicine in the lobby. Later, he resolutely resigned and returned to his hometown to treat his neighbors. When he returned home, it was winter. He saw that the villagers on both sides of the Baihe River were sallow and emaciated, hungry and cold, and many people's ears were frozen. He asked his disciples to set up a medical shed and a cauldron in Dongguan, Nanyang, and give up their "charming ears" to cure frostbite on the day of the winter solstice. He boiled mutton and some herbs for dispelling cold in a pot, then fished out the mutton and medicines and chopped them, made them into ear-like "Jiao Er" with bread. After cooking, he distributed two "Jiao Er" and a big bowl of broth to everyone who came to ask for medicine. People ate "Jiao Er" and drank "Quhan Tang", and they were warm all over, with fever in both ears and frostbitten ears cured. Later generations learned the look of "Jiao Er" and packaged it into food, also called "jiaozi" or "flat food". Eating jiaozi on the winter solstice is not forgetting the kindness of Zhang Zhongjing, a "medical sage", in "Quhan Jiaoer Decoction". Up to now, there is still a folk song in Nanyang, which says, "The winter solstice misbehaves the jiaozi bowl, and nobody cares if you freeze your ears.". Red bean glutinous rice in Jiangnan water town, there is a custom that the whole family get together on the night of the winter solstice to eat red bean glutinous rice. According to legend, * * * Gong's was a gifted scholar who did many evils and died on the winter solstice. After his death, he became an epidemic ghost and continued to harm the people. However, this epidemic ghost is most afraid of red beans, so people cook red bean rice on the winter solstice to ward off the epidemic ghost and prevent and cure diseases.