The formula of the twenty-four solar term song is as follows:

Spring rains startle the spring and clear the valley, and summer is full and summer is summer. Autumn is exposed, autumn is cold and frost, and winter snow is small and winter is cold. In the first half of the year, it falls on June 21st, and in the second half, it falls on August 23rd. The dates of two festivals per month are fixed, with a maximum difference of one or two days.

The plum blossoms in beginning of spring are particularly bright, and the rain apricot blossoms are fresh; I was shocked by the thunder in Lulin, and butterflies danced among the flowers at the vernal equinox. Qingming kite is broken, Grain Rain tender tea jade company; Mulberry fruits in long summer are like cherries, and Xiaoman raises silkworms and cultivates fields. Before the mango seedlings are put into court, the summer solstice rice flowers are like white practice; The light summer wind urges the early beans to ripen, and the Chi Pan enjoys the red lotus in the hot summer.

beginning of autumn knows how to make people sleep, and sunflower smiles in the summer; The white dew is returning to the wild goose, and the autumn equinox is full of osmanthus fragrance. Cold dew vegetable seedlings are green in the field, and first frost reed flowers float all over the sky; Beginning of winter reported good news and offered three rewards, and light snow and goose feathers flew in pieces. The snow is cold and the plum blossoms are crazy in the wind, and the winter solstice is full of snow. A little cold wanderer is homesick, and the end of the cold year celebrates reunion.

Seasonal alternation

Twenty-four solar terms, which basically summarizes the exact time of seasonal alternation in a year and the occurrence laws of some natural phenomena such as phenology in nature. All the year round, beginning of spring, long summer, beginning of autumn, and beginning of winter begin with "four stands".

Four seasons alternate in a year, and "Four Stands" indicates the rotation of four seasons, reflecting the changes in phenology, climate and other aspects, such as spring, long summer, autumn harvest, winter storage, and the changing laws of sunshine, rainfall and temperature. China has a vast territory, mainly located in the low and middle latitudes.

In the low latitude area of China (south area), the precipitation is abundant, the sunshine is sufficient, the temperature difference between winter and summer is small, and the climatic factors such as sunshine and precipitation change obviously when the seasons change.