Where is the knot of geomantic snail's hole?

Where is the knot of geomantic snail's hole? -Surrounded by mountains and water, there is affection on all sides, gathering wind and gas, and putting it away freely; From the outward perspective, you can't see where the point is, but from the outward perspective, the surroundings are very clear, and this is the location of the real point. Otherwise, it is a virtual flower border without holes, and there are no holes at all.