What is the relationship between the vernal equinox in the 24 solar terms and Grain Rain? Twenty-four solar terms and a fragment of solar terms in Grain Rain.

1, the solar term between the vernal equinox and Grain Rain is Qingming.

2. Tomb-Sweeping Day, also known as outing festival, outing festival, March festival and ancestor worship festival, is celebrated at the turn of mid-spring and late spring. Tomb-Sweeping Day originated from the ancestral belief and the custom of worshipping spring in ancient times, which has both natural and humanistic connotations. It is both a natural solar term and a traditional festival. Grave-sweeping and outing are the two major themes of Tomb-Sweeping Day etiquette and customs, and these two traditional themes have been passed down from ancient times to the present in China.