In the northeast, in the song dynasty of the twenty-four solar terms, by the rain goose river, what does it mean?

The word "wild geese raining by the river" literally means rainy solar terms, and geese will appear by the river. Actually, what I want to express is the scene of seasonal changes in nature.

Rain is the second of the 24 solar terms. Like Grain Rain, light snow and heavy snow, it is a solar term reflecting precipitation. It is located on the 15th day of the first month of each year (February 18-20 of Gregorian calendar), which means that the rainfall begins and gradually increases.

Since it began to rain, the temperature began to rise, the snow and ice melted, and the precipitation increased. The geese flying south all went back to the north. In solar term song, "The sun turns in early spring, and the rain geese are by the river" describes the scene that the geese fly back to the north after the weather gets warmer and rest by the river in their habitat, showing a scene in which everything is full of vitality in early spring.