In Introduction to Medicine, it is mentioned that five days is a waiting period, three waiting periods are one breath and two breaths are one month. Why do you say 60 days is one breath?

The ancients thought that the fifth day was waiting, and the third day was solar terms, that is, the fifteenth day; The six solar terms are a season, that is, four months, and the four seasons are converted into one year, which is what we call the four seasons of the year. Every major solar term conversion is easy to cause diseases, such as vernal equinox, autumnal equinox, slight cold, severe cold and so on. This also reminds us to pay attention to health and solar terms and prevent diseases.

On the Beginning of the Theory of Three Stages in Autumn

"When the cool breeze arrives" means "the cold wind in the west is called cool breeze, the temperature changes and the chill begins to fade". In other words, the wind in early autumn is no longer the hot air in summer, and the weather begins to get cold.

"Waiting for the white dew to fall" means "After the heavy rain, the cool wind came, but the weather was dripping in the vast white, and the beads had not yet condensed, so the white dew fell, showing the white color of autumn gold." In layman's terms, it is the fog that begins to appear on the ground in the morning.

"Third-class cicada singing" means "cicadas that feel cloudy and sing in autumn also begin to sing". The cicada began to sing, indicating that the weather was really getting cold. Cicada is the signal of autumn, just as cuckoo is the signal of summer.