What are the three stages of beginning of spring in ancient China?

In ancient China, beginning of spring was divided into three periods: "The east wind thawed; Second, the stinger began to vibrate; Third, the fish will be cold. "

It is said that the east wind warms and the earth begins to thaw. Five days after beginning of spring, hibernating insects slowly woke up in the cave. Five days later, the ice in the river began to melt and the fish began to swim on the water. At this time, there is still broken borneol on the water, floating on the water like ice on fish.