What kind of mnemonic method is used in solar terms and songs in China?

You can help recite Song's formula through solar terms:

Spring rain surprises spring and bright valley days, and summer is full of mans and summer heat is connected;

Autumn dew, autumn frost, little snow in winter and cold in winter.

There is no change in the two festivals every month, with a maximum difference of one or two days;

The first half of the year is June 2 1 day, and the second half is August 23.

This song is compiled according to the law of names for the convenience of memory. The first four sentences are composed of one word in each solar term in sequence, which is the main body of the whole solar term song, and the last four sentences are the time laws of the 24 solar terms. That is, in the first half of the year, the solar terms are around the 6th and 2 1 of each month, and in the second half, around the 8th and 23rd of each month.

There are 24 solar terms throughout the year.

Conversely, it is called: Spring rains shake the spring and clear the valley, summer is full and summer is hot, autumn dew is cold and frost, winter snow is small and winter is cold. Beginning of spring, rain, sting, vernal equinox, Qingming, Grain Rain, long summer.

There are Xiaoman, Mangzhong, Summer Solstice, Slight Summer, Great Summer, beginning of autumn, Early Summer, Millennium, Equinox, Cold Dew, Early Frost, beginning of winter, Xiaoxue, First Snow, Winter Solstice, Slight Cold and Severe Cold. The 24 solar terms are evenly distributed in a year, and there are only six solar terms in each season.