The eight diagrams orientation map shows that "the south is for doing things, and the north is for Kun", rather than the north is for the south. What does it mean?

Doing things for the sky is south, so it is on the ground; Kun is the land of the north, and I am the next. It is the orientation of gossip formulated by the ancients according to the law of yin and yang of heaven and earth, which is completely opposite to the current map orientation.

Supplement:

There is really no explanation for this problem. I think it may be that the south is hot and the north is cold, and the south is replaced by the first generation of Yang, and the north is replaced by the first generation of Kun.

I didn't find the exact basis, it was purely personal imagination.