The principle of eating radish in winter and ginger in summer is the embodiment of "nourishing yang in spring and summer and nourishing yin in autumn and winter". When ginger is eaten in spring and summer, it can enhance the yang of human body when its yang-dispersing power matches its yang-exuberant power. Eating radish in autumn and winter is sweet and cool, moistening the lungs, helping yin essence and Yin Qi to hide inside.

As the saying goes, "there is no doctor's prescription for eating radish in winter and ginger in summer", which means that it is of great significance to regulate yang. Huangdi Neijing said: "Yin and Pingyang are dense qi" means that the balance of Yin and Yang will not cause disease, and "Yang transforming qi and Yin forming" means that the generation, development and change of all things in nature are inseparable from the interaction of Yin and Yang. Yang Can's active dispersion promoted the gasification of everything; Yin governs static coagulation, which can promote the formation of all things.

Traditional Chinese medicine believes that people's health care should follow the principle of "harmony between man and nature", conform to the changes of yin and yang in nature, and change their daily life and diet with the ups and downs of the day and the changes of seasons. Among them, "nourishing yang in spring and summer, nourishing yin in autumn and winter" is a kind of health preservation method that conforms to seasonal changes. It means that when the climate gets cold, the world tends to be closed, the yang of the human body converges, and the yin essence is hidden inside, so it is necessary to maintain the yin essence and yin in the body in late autumn and winter; In spring and summer, the qi of heaven and earth recovers, and everything begins to be born, and the yang is born. People should adapt to the climate characteristics and let the sun live.

Ginger is pungent and warm, and enters the lung, stomach and spleen meridians. It has the effects of relieving exterior syndrome, dispelling cold, reducing adverse reactions, stopping vomiting, resolving phlegm, relieving cough and detoxicating. When eating ginger in spring and summer is combined with the prosperity of heaven and earth, it can strengthen the human yang with twice the result with half the effort. In addition, although the sun is in full swing in summer, people are greedy for cold and drink cold, and it is easy to feel cold evil. Eating ginger can dispel cold and relieve exterior syndrome, and nourish yang for a long time without suppressing yang. Radish is pungent, sweet and cool, belonging to lung and stomach meridians. It has the effects of moistening lung, promoting digestion, resolving phlegm, relieving cough, inducing diuresis and relaxing bowels. Eating radish in autumn and winter is sweet and cool to moisten the lungs, which not only prevents the yin essence from being damaged by autumn dryness, but also helps the yin essence and Yin Qi to be stored in it, while radish is sweet, which can replenish yang and help people keep out the cold.