Please help me analyze the houses facing north in Beijing.

Geophysical, the site effect is not good, and the lighting is definitely not good.

But not if you live in a tall building. It depends on whether there are obstructions or higher buildings around you that block your sunshine.

In addition, when you talk about ventilation, that is, ventilation, it depends on the specific apartment. If the apartment is transparent, there can be convection before and after, and ventilation is definitely good.

30 degrees north to east means a little north and a little east. You can get more light in summer, but not in winter. There is almost no light. Because the sun is in the tropic of cancer in summer, you can get relatively more light. In winter, the sun is near the Tropic of Cancer. Just think about the angle of the sun. This is just the opposite of warm in winter and cool in summer, so it is worse than other houses.

Feng shui is not necessarily a bad thing, it depends on the date of birth and the person in charge of your family.

I hope it helps you!