Compass measures the problem from mountain to mountain. My house has a front door and a back door. Li Juming's book says there are three steps outside the front door. How to measure?

Take the center line of the gate as an example. If you use the eight or nine planets in Feng Shui, use the place where you often breathe as the gate! Just go directly to the gate of the community, which is the main entrance. If you want to refine, then calculate the unit door! Look at the whole community, look at your own small house and look at the unit door. You got it?