What is situation in grave Feng Shui? What is shape? What is momentum?

That is, topography and topography. The Burial Sutra says: A thousand feet is a potential, a hundred feet is a form. Form is a close-up view, potential is a distant view, there is potential and then there is form, there is opening and then there is potential, form is inside, potential is outside, potential is thick and shape is thin, potential is the undulating peaks, form is a single mountain, and momentum is like a city wall The wall is shaped like a balcony and a door. It is difficult to recognize the situation, but easy to observe the shape. The incoming force is the basis, and the moving shape is the end. The front, back, left, and right are called the four positions, and the mountains and rivers are called the three shapes.