What does it mean that spring rains shock the spring and clear the valley?

Spring rain shocks spring and clears the valley, which are the six solar terms in spring, as follows: the first spring is beginning of spring, the rain is rain, the shock is sting, the second spring is vernal equinox, the clearing is Qingming, and the valley is Grain Rain. The full version is: Spring rains shake the spring and clear the valley, and midsummer is connected with summer heat. Autumn dew, autumn frost, little snow in winter and cold in winter. The two festivals remain unchanged every month, with a maximum difference of one or two days. I learned 62 1 in the first half and 823 in the second half.

The meaning of the twenty-four solar terms.

The first four sentences, each sentence contains six solar terms in spring, summer, autumn and winter. Each sentence takes one of the six solar terms. The name of the twenty-four solar terms is two words. If you remember the solar term Song, you will remember half of the 24 solar terms. The 24 solar terms are listed as follows:

Spring: beginning of spring, Rain, Sting, Equinox, Qingming, Grain Rain;

Summer: long summer, small full, mangzhong, summer solstice, big trees, small trees;

Autumn: beginning of autumn, early summer, Bailu, autumnal equinox, cold dew and early frost;

Winter: beginning of winter, light snow, heavy snow, winter solstice, slight cold and severe cold.

The two solar terms remain unchanged every month, that is to say, 24 solar terms are evenly distributed in 12 months of a year, with two solar terms per month, neither more nor less. June 2 1 day in the first half of the year, and August 23 in the second half. This sentence is not easy to understand. What does this mean? This means that the first half of the solar term is the 6th and 2 1 of each month, and the second half is the 8th and 23rd of each month.