What do you mean by going north and south?

1 From the analysis of geographical environment, there are many plateaus, hills and plains in the north, lakes and rivers in the south and hills in the basin. The same reason as going up the mountain and down the river. So "going north" and "going south" are historical analysis. Since ancient times, emperors, houses, gardens and gardening have all faced south. 3 maps, all marked with 4 left Qinglong, right White Tiger, Upper Suzaku and Lower Xuanwu. The east is a dragon, the west is a white tiger, the north is a suzaku, and the man is Xuanwu. Therefore, "going north to the south" in the Book of Changes thinks that the south is yin and the north is yang, which means that the north respects the south, that is, the north is high and the south is low, so the south is downward and the north is upward.