Excuse me, what is the meaning of "heaven and earth turn" in the eight characters?

Heaven and earth turn to kill: spring rabbit summer horse autumn chicken winter mouse spring rabbit summer horse heaven and earth turn, autumn chicken winter mouse is a curse; Pedestrians will worry about dying on the road, and they will be mourned before doing evil. Extreme things will be reversed, which is called prosperity. Ke Zi said: The sky turns prosperous, and the sound turns day by day, which means that heaven and earth turn. For example, when Chunmu was flourishing, I saw that Yi Mao was the sky, representing the turn of the sky, and I saw that Xin Mao was using Yin Na to represent the turn of the earth; Xia Nai's fire is flourishing, seeing that Bingwu is the turn of the day, and seeing Wuwu is the turn of the earth; Autumn is Wang Jin, a good friend is a friend of heaven, and Gui You is a friend of earth. In winter, when the water is flourishing, you can see the sound of Lunzi turning to the sky, Bingzi turning to the ground and turning slowly. On this day, the most taboo things are post offices, businessmen, filming and marriage, which will be fatal and will be greatly discounted on this day.