Appreciation of clay works in the twenty-four solar terms:

Ancient calendars were divided according to the position of the sun on the ecliptic. It refers to the 24 solar terms in a year, such as beginning of spring, rain, fright, vernal equinox, Qingming, Grain Rain, long summer, Xiaoman, Mangzhong, Summer Solstice, Slight Summer Heat, beginning of autumn, Chushu, Bailu, Autumn Equinox, Cold Dew, first frost, beginning of winter, light snow, heavy snow, winter solstice, slight cold and severe cold. It plays an important role in prompting farming steps.

Twenty-four solar terms (24 solar terms) are the knowledge system and social practice formed by China people by observing the annual movement of the sun and recognizing the changing laws of seasons, climate and phenology in a year. They are the products of ancient farming civilization and have guided Chinese traditional agricultural production and daily life for thousands of years. Twenty-four solar terms are China people's world outlook, which reveals and refines this orderly ecological change law in a year.

As the main political, economic, cultural and agricultural activity centers in China are mostly concentrated in the Central Plains of the Yellow River Basin in history, the 24 solar terms were established based on this area. 24 solar terms is the wisdom crystallization of ancient ancestors in China. As far back as the Spring and Autumn Period, the ancient sages of China set four solar terms: midsummer, midsummer, midsummer and midwinter, which were continuously improved and perfected.

By the Qin and Han Dynasties, the 24 solar terms had been completely established and became a supplementary calendar used to guide farming in ancient China. In the international meteorological field, the 24 solar terms are known as "the fifth invention of China".