Su Shi's "Western Pavilion" What is "Rain Wheat in the Sunshine of Qishan Mountain"

Look at the context, "it's another spring, and the rain wheat has occupied a year in the sun of Qishan." In the spring of this year, when it rained, the wheat in the south of Qishan fell with the rain. Through divination, it was thought that the grain should be harvested this year.

From the part of speech, rain is a noun used as a verb, meaning rain.

From a scientific point of view, it is normal to have wheat when it rains. If it rains heavily because of a tornado, you can pack things from A to B or C. In ancient times, I didn't know much about science, and I didn't know whether it was good or bad to drop wheat from the sky. This is determined by divination.