I want to ask what's wrong with facing the window and feet facing the window in the bedroom?

That doesn't mean you don't face the window. Of course, you can't face the tuyere first, because it is easy to have a stroke when your head is blown by the wind.

Secondly, the head and feet should face south or north. This is in line with the earth's magnetic field. Strictly speaking, China District should be five or six degrees east of the north, which just corresponds to the north-south magnetoelectricity.