What do you mean by "fifth class"

Five phases refer to the "small" solar terms in the twenty-four solar terms, and each solar term is divided into two parts: "big" solar terms and "small" solar terms. Each solar term lasts for 5 days, so it is called five periods. For example, the fifth day after beginning of spring is a "short wait" in the solar terms.

In ancient China, the five seasons were widely used in agriculture and health preservation. Farmers will choose the time of planting and harvesting according to the changes of five seasons, so as to make full use of the appropriate time and place. Diet, daily life, exercise, etc. It is also necessary to follow the "five stages" rule in order to maintain health and adjust the energy balance in the body.

Nowadays, in contemporary China, although the five seasons are not as important as in ancient times, they are still paid attention to and utilized by some people. In the medical field, the five-phase theory has been applied to Chinese medicine, acupuncture, massage and other techniques. In addition, some people will adjust their daily life according to the changes of the five seasons to improve their quality of life and health.