1. Duck meat: Duck meat is one of the must-eat foods during the frost season. Duck meat is not only rich in protein, which can promptly replenish excessive consumption in summer, but is also cool in nature and has the effects of nourishing yin, nourishing the stomach, and strengthening the spleen.

2. Jujube: Jujube is rich in nutrients such as protein, fat, sugar, carotene, B vitamins, vitamins C, P, calcium, phosphorus, iron and cyclic adenosine monophosphate. Jujube has a high vitamin C content, with more than 400 mg per 100 grams of fresh jujube meat. Some people call it a "natural vitamin C pill" that has antioxidant and anti-aging effects. Folk proverb says: If you eat three dates a day, you will not look old throughout your life. Jujube is one of the first choices for frosty health-preserving fruits.

3. Persimmons: If you eat persimmons during frost, you will not have a runny nose. Persimmons have high nutritional value, containing about 1-2 times more vitamins and sugar than ordinary fruits. If a person eats one persimmon a day, the vitamin C intake can basically meet half of the daily requirement. Therefore, eating some persimmons is very beneficial to human health.

4. Mustard greens: It is understood that mustard greens are rich in A and B vitamins. These two vitamins can participate in the important redox process of the body, increase the oxygen content in the brain, stimulate the brain's use of oxygen, and have the effect of refreshing the brain and relieving fatigue. In addition, mustard greens also have a good appetizing and digestion effect. After pickling, mustard greens have a special umami taste and fragrance, which can promote gastrointestinal digestion and increase appetite. It can both appetize and aid digestion.