What is particular about the design of villa fish ponds?

If the main shape of the villa is square, then the fish pond is suitable to be built into a circle, thus creating a "round place" pattern, which conforms to the natural cycle. Fish ponds are generally designed to be quasi-circular with shallow water on all sides, and they should be slightly inclined to residential buildings (the circle faces forward). From the perspective of geomantic omen, this design can hide the wind and gather gas, and increase the freshness and comfort of living space.