Because the sitting direction of the house refers to the direction of the back of the house. For example, if the house "faces south" means that the back of the house faces north and the front faces south.
According to the simplest traditional way, it can be divided into eight directions: Zuo Dong, Zuo Xi, Zuo Nan, Zuo Bei, Zuo Northeast, Zuo Southeast, Zuo Northwest and Zuo Southwest, and it can also be subdivided into East Fourth Hospital and West Fourth Hospital. Dongsi House is a house with east, south, north and southeast. Xisi House is a house with west, northwest, southwest and northeast.
Extended data:
The origin of residential orientation
As early as the primitive society, Han ancestors built village houses facing south, and most of the houses discovered by archaeology face south. In the Shang and Zhou Dynasties, the direction of measurement was the first step in choosing the environment. According to the poem Gongliu, the scenery at that time was a mountain, and yin and yang were harmonious.
Chao, a politician in the Han Dynasty, once suggested that when choosing a city site, we should "consider the combination of Yin and Yang, taste its springs and judge its suitability, which is the boundary between architecture and fields." In other words, the north is cloudy, the south is yang, the north is cloudy, and the south is yang.
The ancients thought that the north was yin and the south was yang, and the place with good feng shui should be harmonious between yin and yang. As early as the primitive society, China ancestors built village houses facing south. Most of the ancient houses found in modern archaeology face south. Until modern times, the house facing south is still the first choice for modern people to buy a house at home.
Baidu encyclopedia-home sitting orientation