How many solar terms are there in China lunar calendar?

Twenty-four solar terms memory formula:

Formula 1: Spring rain shocks spring and bright valley days, summer is full of mans, and summer is even. Autumn dew, autumn frost, little snow in winter and cold in winter.

Formula 2: Spring rain shakes the valley in spring, and summer is full of mountain heat. Autumn dew, autumn frost, little snow in winter and cold in winter. The first half of the year is June 2 1 day, and the second half is August 23. The dates of the two festivals each month are fixed, with a maximum difference of one or two days.

Formula 3: A slight cold is followed by a severe cold in January, and it will rain in the early spring of February. March of vernal equinox, April of Qingming Grain Rain. May is Changxia and Xiaoman, and June is the summer solstice company. In July, there was a slight summer heat and a great summer heat, while in August, beginning of autumn was in the midst of a summer heat. In September, the Millennium meets the autumnal equinox, and the first frost and cold dew are all in October. There is a light snow in 1 1 month in beginning of winter, and a heavy snow in winter solstice to welcome the New Year.

Formula 4: beginning of spring plum blossoms are particularly bright, and Yuhong apricots are fresh; Lulin thunder, butterfly dance between flowers at the vernal equinox. When the kite was broken in Qingming Festival, Grain Rain was accompanied by tender tea and emerald, with long summer mulberry fruits like cherries, and a small man who cultivated silkworms. Before mango seedlings enter the palace, the summer solstice rice and flowers are like white practice; Summer breeze urges early-maturing beans, and Chi Pan enjoys red lotus in hot summer. Beginning of autumn knows how to make people fall asleep, and sunflowers smile in summer. The white dew returns to the geese, and the autumn equinox smells like osmanthus. Cold dew vegetable seedlings are green, and the first frost reed flowers are floating all over the sky; Beginning of winter reported good news, reported three rewards, and light snow and goose feathers flew in pieces. The snow is very cold, the plum blossoms are crazy in the wind, and the winter solstice is full of snow. Little cold wanderers are homesick, and they celebrate reunion at the end of the cold year.