What is the meaning of "Big Sky King Feng Shui"?

The "big void" in Kong Xuan geomantic omen means that the sitting direction (orientation) of the house is just pressed on the dividing line of the eight hexagrams (i.e. the orientation is 45 degrees each). This kind of house is also fierce. If you want to buy a new house, you should pay attention. If you don't buy a small space, the sitting direction (orientation) of the house is just on the three orientation lines subdivided by each hexagon (15 degrees).