What are the three periods of rain in ancient China?

In ancient China, rainwater was divided into three stages: "One stage was that Rex sacrificed fish; Second, wait for Hongyan to come; " Waiting for the plants to germinate. "

In this solar term, otters start fishing and put the fish on the shore like sacrifices before eating; Five days later, the geese began to fly back to the north from the south; Five days later, in the "moist and silent" spring rain, the spirit of the sun rose everywhere and began to sprout. Since then, the earth has gradually begun to show a thriving scene.