More attention should also be paid to our bodily condition. "In general, it tells us that nature is about to turn around, and what should be guarded against is autumn dryness," Guo says. "With such a transition, it can easily damage the lungs. The ancients used many methods. For example, in order to nourish and protect the lungs, the ancients used moxibustion.

"Food also brings benefits. Lentils have a good effect on moistening and invigorating the lungs. Then there are pumpkin, millet and mung bean to protect the respiratory apparatus.

"At this time, the ancients suggested that the acrid and polyacid ingredients should be reduced, and more sour foods should be eaten to protect the liver. Therefore, the noodles and sauerkraut that the northerners like are all very good ingredients. The ancients also mixed pears, apples and honey to make a kind of fruit porridge, a secret porridge to moisten the lungs. Bayberry is also good for moistening the lungs and relieving coughs."