The order of mango seeds arranged in light rain in spring equinox is clear.

Grain seed, vernal equinox, Xiao Man, rain and Qingming are all 24 solar terms.

The order is:

Rain, vernal equinox, Qingming, Xiaoman, Mangzhong.

Twenty-four solar terms refer to 24 specific seasons in the solar calendar, which are formulated according to the change of the position of the earth on the ecliptic (that is, the orbit of the earth around the sun), and each solar term corresponds to a certain position that the earth reaches every time it runs 15 on the ecliptic.

Twenty-four solar terms are a knowledge system formed by observing the movement of the sun in a year and understanding the changing laws of the four seasons, climate and phenology in a year. It divides the sun's annual trajectory into 24 equal parts, and each equal part is a solar term, starting from beginning of spring and ending with the great cold.

The twenty-four solar terms are:

Beginning of spring, Yu Qiu, Beijing and Zhejiang, vernal equinox, Qingming, Grain Rain, Mangxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoshu, Dashu, beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew, First Frost, beginning of winter, Light Snow, Heavy Snow, Winter Solstice, Slight Cold and Severe Cold.

The songs of the twenty-four solar terms are:

The spring rain shakes the spring and the valley days, and the summer is full of mountains and summers.

Autumn, autumn frost, winter snow, winter cold;

The two festivals remain unchanged every month, with a maximum difference of one or two days.

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