Why did the emperor "sit north and face south" to rule the world?

Learned from the theory of yin and yang and divination:

The direction of the wind changes uncertainly. There are records of wind measurement in oracle bone inscriptions. "Historical Records. Lushu" says: "Buzhou wind lives in the northwest, which is October. Guangmo wind lives in the north, which is November. Tiao wind lives in the northeast, which is the first month. Ming Shufeng lives in the east, which is February."

There is a difference between yin wind and yang wind. He Guangting in the late Qing Dynasty said in his "Guide to Earth Science": "Pingyang is not afraid of wind, but there is a difference between yin and yang. If the wind is warm and warm to the east and south, it is called yang wind, so there is no problem. If it is blown to the west and north, it is called yang wind. Cool wind, cold wind, so-called dark wind, should be blocked by a nearby case, otherwise the wind will chill the bones and ruin the home. "This is to avoid the northwest wind.

The methods of expressing directions in Feng Shui include: First, the five elements of wood are east, fire is south, gold is west, water is north, and earth is middle. Secondly, Li is the south, Kan is the north, Zhen is the east, and Dui is the west in Bagua. Third, the stems and branches A and B are the east, Bing and D are the south, Geng and Xin are the west, and Ren and Gui are the north. The child of the earthly branch is the north, and the noon is the south. Fourth, the east is the Canglong, the west is the White Tiger, the south is the Suzaku, and the north is the Xuanwu. Or it is called: "Green Dragon on the left, White Tiger on the right, Suzaku in the front, Xuanwu in the back." "Wuxing Zhi. Talk" records the layout of the acupoint code named Xingjunzhi: the hall is in the middle, Qiaomen wings in front, "Bian Cang" supports behind, "Qingfeng", "Huijing", "the sales office is winding on the left, and there is a green dragon elephant." The first floor of "Mingyue" stands alone in the southwest, in the shape of a tiger dwelling, which is consistent with the Yin and Yang family theory

In ancient times, the south was regarded as Supreme, while the north symbolizes failure and surrender. Palaces and temples all faced due south, and the emperor's seat always faced south. When he became the emperor, he was said to be "honored by the south"; when he lost a battle or submitted to others, he was "defeated" and "called his subject by the north." It is precisely because the direction of due south is so honored that in the past, when people built houses, no one dared to take the direction of due south of the meridian. They always moved east or west to avoid violating taboos and being punished.

Also, personal opinion:

Since ancient times, Chinese orthodoxy originated in the north. Do you think any southern dynasty lasted for a long time?

So since ancient times, China has focused on the north!