It means that when spring comes, we should reduce clothes and cover them later, but when autumn comes, don't add clothes early, and slowly add more frozen ones. You can wear less clothes to keep cool in summer and more clothes to keep warm in winter.

First, spring, long summer, autumn harvest and winter storage actually describe the climate change of the four seasons. This is from Neijing. "Spring March, that is, Chen, heaven and earth are thriving, and everything is glorious ... Xia San month, that is, the so-called complex show, the harmony between heaven and earth, and everything is gorgeous ... autumn March, that is, the so-called banyan screen, the weather is tight, the atmosphere is clear ... winter March, that is closed, and water and ice are frozen.

The three months of spring, called "bringing forth the old and bringing forth the new", are the season of life germination. Heaven and earth are natural and full of vitality, and everything seems to be thriving. The three months in summer are called "anti-show", which is the season when everything in nature is lush and beautiful. At this time, the weather drops, the earth's atmosphere rises, the heavens and the earth intersect, and plants bloom and grow vigorously.

Second, the three months of autumn are called tolerance, and the natural scene is precipitated and converged because everything is mature. At this time, the sky is high and the wind is urgent, and the atmosphere is clear. The three months of winter, known as "closed doors and hiding", are the season when vitality lurks and everything hides. At this time, Shui Han was frozen and the earth cracked.

Third, according to the weather changes in nature, people should keep in good health like nature.

Four, since ancient times, there has been a health care proverb in China that "spring covers the autumn and it freezes, and there are no miscellaneous diseases".