I’ll take as an example the Northwest (NW) sector of your house. If it is partially or completely missing, the NW sector corresponds to the Qian trigram. This trigram represents the father, but it also represents the head, bones, nose, and is associated with the metal element. This can indicate that the father is not very present at home—he may be occupied with work, sports, or community activities, spending a lot of time outside the house. From a health perspective, it can also mean that household members may experience issues such as persistent coughs or rheumatism. Similarly, if your environment attacks the South sector with what we call a poison arrow, it can cause eye problems or high blood pressure. The arrow weakens the Li trigram, which corresponds to the fire element.