After the beginning of winter, the weather became colder and the light snow solar term came slowly. Light snow is the second solar term in winter. It is generally celebrated from November 22-24 of the Gregorian calendar. In the Collection of Seventy Two Marquises of the Moon Order, it is explained that its name is: "In October, when it rains, the cold air thins, so it congeals and becomes snow. It is a word for small people." At this time, some areas in the north have seen the first snow, but because the climate is not cold, the snow is small, and there is no snow, so it is called "light snow". Yuan Zhen, a poet of the Tang Dynasty, once wrote "Poem on Twenty four Qi · Light Snow in October": "Don't blame the rainbow for being shadowless. Now it is light snow. The Yin and Yang are up and down, and the cold and summer weather are like separation. The moon is full and the sky is Han, and the wind is ringing the branches. The Hengqin is still frowning at the other spirits." In the poem, Xiaoxue's "three weathers" are written, that is, "the rainbow is hidden, the weather is rising, the earth's atmosphere is falling, and winter is formed by blocking". The ancients thought that the yin qi decreased and the yang qi increased during the light snow, so the rainbow disappeared. There is no communication between yin and yang when they rise and fall, which leads to the blockage between heaven and earth, so winter comes. From the perspective of modern science, a rainbow is an arched spectrum formed by refraction or reflection of small water droplets in the air exposed to sunlight. After light snow, "the rainbow is hidden", mainly because the air is dry and it is difficult to form a rainbow. At this time, although there was no snow in the south, it also presented a bleak scene. Every morning, there is a thin layer of white frost between the leaves of plants and trees and on the land. From a distance, it has a unique taste of "frost falling like snow". In the winter months, there are fewer and fewer seasonal vegetables, but there is a delicious vegetable growing on the frost land, called Tancai. Collapse vegetable, also known as black cabbage, is named after its outer leaves collapse on the ground and grow flat on the ground. It tastes slightly bitter and is also called Collapse bitter vegetable. This dish is cold resistant and has strong growth capacity. A small plot of land in front of and behind the house can produce several green collapsed vegetables. Wang Zengqi wrote in "Winter": "My grandmother set aside a small plot of land in the backyard to grow black vegetables. After frost, the edges of the leaves turn purple red, and the taste is bitter and sweet. Black vegetables and 'crab oil' are boiled together, and the taste is hard to compare." Tacai is a variety of Chinese cabbage. Its leaves are thick green, fat and tender, and can survive the winter. After being beaten by frost, the vegetable leaves are soft, juicy and slightly sweet. There is a folk saying in Jiangsu and Zhejiang provinces that "after snow, the vegetables will be replaced by mutton". With the arrival of light snow, people are busy storing food for the winter. As the saying goes, "pickles in light snow, bacon in heavy snow". A few days after the light snow, each family would set up pickles, buy fresh vegetables, wash them slightly or dry them in the sun, and add salt into the jars, which are called "salted vegetables" or "salted vegetables". The jar for pickles is indispensable to every family. In the old days, there was a big jar for pickles under the eaves of a family's hall and in the firewood room in Shaoxing, Zhejiang. Pickle is a regular dish to alleviate the shortage of vegetables in winter. Whether the family can make pickles or not enough pickles become a symbol of whether the family can live. It is "couples grow light, pickles grow rice". There are rich varieties of pickles, including Chinese cabbage, amaranth root, potherb mustard, radish, beans, etc. In terms of the selection of ingredients and the method of pickling, people from all over the country have the secret recipe of "old tradition", so the taste of pickles is different. Northerners like pickled mustard and pickled pickled cabbage. People in Suzhou, Jiangsu, are used to cut turnips into inches, mix them with wine and salt, bring them into the region, and bury them in lime cellars. When the region is opened in spring, turnips are yellow and fragrant, commonly known as "spring is never old". Yudongduo