Li Juming talks about feng shui doorways.

1. One side of the compass is facing the gate, then rotate the disk inward to make the celestial needle coincide with the north-south line, and observe that the red line on it coincides with the sitting direction. In fact, the best measurement is three times inside, inside and outside the door. It would be nice if the data on the same central axis were consistent. If there is a deviation, or a large deviation, it needs to be measured outside the house, because the magnetic field inside the house is affected.

This statement is wrong. If it were me, I would refer to the information of Su Minfeng. He mentioned that commercial housing is not based on the floor, but on the property rights of the house. In other words, if the whole building is yours, it should be considered as the gate of the building. If you only belong to one of the owners of the building, you should only look inside your house, regardless of the door. If you have to look at the door, just look at the surrounding environment.

3. Draw your own corner to make it a standard square or rectangle, and then set the center point, because the beginning of the nine squares is square to match the orientation. If it is a missing corner, in fact, that place is already included in the space of the house, so the missing part should be counted, and that part should be completed and then calculated.