Grain Rain was taken from the meaning of "Rain gives birth to a hundred valleys", and the precipitation increased obviously at this time. Seedlings and new crops in the field need the moisture of rain most. Only when the rainfall is sufficient and timely can cereal crops thrive. Grain Rain, like rain, Xiao Man, light snow and heavy snow, is a solar term reflecting precipitation and ancient farming culture.

In Grain Rain season, in the south of our country, it often begins to appear obvious rainy weather, especially in the south of our country. Once cold air meets warm and humid air, it often forms a long rainy weather. Qinhuai River is a transitional zone between spring rain in the south and spring drought in the north. From the Qinling-Huaihe River to the north, the spring rain decreased sharply. In the northern region, Grain Rain is a symbol of the "final frost".

As the sixth of the 24 solar terms, it is also the last solar term in spring. Grain Rain was named after the records, and Grain Rain had a close relationship with Qingming, that is, "Grain Rain was after Qingming" as the old man said. Grain Rain solar terms reflect precipitation, which is similar to rain, light snow and heavy snow.

It also reflects the seasonal characteristics of farming society. Folk sayings are more popular, such as "before Grain Rain, the clock cotton is good" and "Grain Rain is busy planting cotton in the south slope and the north depression; This is also a time sign for farmers to cultivate and plow their fields. Every year from April 19 to April 2 1 day, when the sun reaches 30 degrees longitude of the Yellow River, it is regarded as Grain Rain.

In ancient times, Grain Rain was divided into three periods, which meant that after the solar term in Grain Rain, the rainfall suddenly increased, duckweed began to grow, and cuckoo was a symbol of sowing. Grain Rain also symbolizes auspiciousness, beauty, hope and happiness.