1, Spring Rain Starts Spring, Clear Valley Days: Rain in beginning of spring Starts Stinking, Spring Equinox Clear Grain Rain. The first spring refers to beginning of spring, and the second spring refers to the vernal equinox.

2. Summer is full, summer is full, and summer is summer: it means the names of six solar terms: long summer, Xiaoman, Mangzhong, Summer Solstice, Xiaoshu and Dashu.

3. Dew in autumn and frost in autumn: beginning of autumn, Chushu, Bailu, Equinox, Cold Dew and first frost respectively. Beginning of autumn: Autumn is coming. Summer heat: Summer heat is the end of hot summer days. White dew: The weather turns cold, and the dew is condensed and white. Autumnal equinox: divided equally between day and night. Cold dew: dew is cold. First frost: It's getting colder and frosty.

4. Winter snow and winter slight chill: refer to beginning of winter, light snow, heavy snow, winter solstice, slight chill and severe chill respectively. Beginning of winter: The beginning of winter. Xiaoxue: It began to snow. Heavy snow: the amount of snow increases and the ground is covered with snow. Winter Solstice: Cold winter is coming. Slight cold: It's getting cold. Great cold: the coldest time.

The origin of the twenty-four solar terms

Twenty-four solar terms originated in the Yellow River Basin. As far back as the Spring and Autumn Period, four solar terms, namely, mid-spring, mid-summer, mid-autumn and mid-winter, were set. After continuous improvement and perfection, by the Qin and Han Dynasties, the 24 solar terms had been completely established.

BC 104, written by Deng Ping (early Han Dynasty). The taichu calendar, which was formulated by Emperor Wu of the Han Dynasty, officially set the 24 solar terms in the calendar, and defined the astronomical position of the 24 solar terms. "Solar terms" and "neutral gas" appear alternately, each lasting 15 days. Now people have collectively referred to "solar terms" and "neutral gas" as "solar terms".