Su Wen's theory of four qi said: "Autumn is March, which is called capacity. The weather is urgent, the atmosphere is clear, early to bed and early to rise, the chickens are happy. Calm the mind, slow down the autumn shape, astringe the qi, calm the autumn qi and clear the lung qi. This is the way to nourish the autumn qi. On the contrary, it will hurt the lungs, have diarrhea in winter, and there are few people serving Tibet. "

What do you mean? This means that July, August and September in autumn are the harvest seasons of everything. It is manifested in the atmosphere of heaven and earth, which is characterized by falling and growing, gathering and sprouting, falling weather, restrained atmosphere and clear appearance, and is called autumn crisp.

Because the weather is urgent and the atmosphere is clear, it has changed from sporadic state in summer to convergent state, so it is necessary to lie down early and get up early, and live in sync with the chickens to maintain the peace and stability of the kidneys, thus alleviating the cold air in autumn; In autumn, the five elements belong to gold, and in the body they are lung meridians. The lungs are delicate and dirty, and they are afraid of dryness. Therefore, we should pay attention to nourishing yin and moistening the lungs and harmonizing the qi of autumn dryness. Otherwise, Jiao Zang is easy to get hurt, and he may not feel it at that time. Refractory diarrhea will occur in winter, and the ability to support the hidden qi in winter will be greatly reduced. In diet care, we should implement the principle of "less pungent and more sour", eat less spicy foods such as onions, ginger, garlic and leeks, and eat more sour fruits and vegetables such as pears to clear fire and nourish yin, moisten the lungs and prevent dryness.