After all, there are only two reasons for this subtle statement. One is feudal superstition, and the other is about the direction of earth movement. I think the second statement is more scientific, but the first one is also reasonable. It's just that the ancients didn't understand modern science and technology and formed feudal superstitions.
The first kind of feudal superstition, without reference to the legends of ghosts and gods, mainly talks about sitting in a house facing south all year round, which is helpful for indoor ventilation. In this way, it is warm in winter and cool in summer because of sufficient sunlight and wind protection, and people will become particularly comfortable in such an environment.
When people are in a good mood, good things will follow, but many people think it is because of the good luck brought by sitting in a house facing south. They think that such a house has better feng shui and should be in the right place at the right time. It is precisely because of this that houses facing south are so popular, and most people buy houses because of this pressure.
The second is the direction of the earth's movement. China's earth is divided into the southern hemisphere and the northern hemisphere. Houses in the northern hemisphere have light from south to north, so that the houses facing south have sufficient light and good lighting, and the houses are not easy to get wet, which just caters to the saying and stress of sitting north to south.
To sum up, it is a natural phenomenon to choose a house facing south, which is misunderstood as many feudal superstitions, but in any case, choosing a house facing north still has many advantages, and such a house is also very suitable for self-cultivation.