It is cold and dry in winter. In daily life, go to bed early and get up late, and this season is dominated by kidneys. Traditional Chinese medicine believes that the kidney is the season of main water and belongs to black in color. Eat more black food, such as black fungus, black sesame seeds, walnuts and so on. This season, you can make tea with common medlar and soak red ginseng with clear water. Eat roots and tubers of plants in winter, such as potatoes, radishes and onions. Recommended dish, ribs with radish soup.