The solstice in winter is a good time for health preservation, mainly because "Qi starts from the solstice in winter". Because from 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, thus achieving the purpose of prolonging life. During the winter solstice, the diet should be diversified, with grains, fruits, meat and vegetables reasonably matched, and high-calcium foods appropriately selected. The food should be light, and you can't eat thick, greasy and salty food. In winter, the yang is weak, and the spleen likes warm and hates cold. It is advisable to eat warm and tonic products to protect the spleen and kidney. Eat less and eat more. 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 were once called "the solstice wonton noodles in winter and the solstice noodles in summer" 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, Xiongnu 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 "swallowing". I hate eating, and I want to quell the war and live a peaceful life. Because wonton was originally made on the winter solstice, every household eats wonton on the winter solstice. It is said that the custom of eating dog meat on the solstice began in the Han Dynasty. According to legend, Liu Bang, Emperor Gaozu of Han Dynasty, ate dog meat cooked by Fan Kuai on the solstice in winter, which was particularly delicious and full of praise. Since then, the custom of eating dog meat from winter solstice has been formed among the people. Nowadays, people eat dog meat, mutton and all kinds of nutritious food on the solstice of winter, which is a good sign for the coming year. Eating jiaozi's annual winter solstice, jiaozi is an indispensable holiday feast for the rich and the poor. As the saying goes: "On October 1st, when the solstice of winter comes, every family eats jiaozi." This custom was left in memory of Zhang Zhongjing, a "medical sage", who gave up medicine from the winter solstice. Zhang Zhongjing, who eats jiaozi in winter, is from Xi 'e, Nanyang. He wrote Treatise on Febrile Diseases, which is a masterpiece of doctors. Quhanjiaoqiao decoction has been regarded as a classic by doctors of all ages. Zhang Zhongjing has a famous saying: "if you advance, you will survive;" If you retreat, you will save the people; " You can't be a good doctor and you can't be a good doctor. "When the Eastern Han Dynasty was the magistrate of Changsha, he visited the sick and took medicine and practiced medicine in the lobby. Later, he resolutely resigned and went back to his hometown to treat his neighbors. When he got home, it was already 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 build a medical shed and a cauldron in Dongguan, Nanyang, and give up their "charming ears" to treat frostbite on the day of 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, their ears were hot, and their frostbitten ears were cured. Later generations learned the appearance of Joule and packaged it into food, also called "jiaozi" or "flat food". When you eat jiaozi on the solstice in winter, you will never forget the kindness of Zhang Zhongjing, a "medical sage", in "Quhan Joule Decoction". Up to now, there is still a folk song in Nanyang, which is called "jiaozi Bowl", and nobody cares about frozen ears. "Red bean glutinous rice in Jiangnan water town, there is a custom that the whole family get together to eat red bean glutinous rice in the evening from winter to Sunday. According to legend, * * * Gong was a troubled wit who died in the winter. Become a plague ghost after death and continue to harm the people. However, this epidemic ghost is most afraid of red beans, so people cook red bean rice from winter solstice to drive away the epidemic ghost and prevent diseases.