The standard definition of potential diagram should be: if two graphs are not only similar graphs, but also the corresponding points intersect at one point and the corresponding line segments are parallel to each other, then such two graphs are called potential diagrams, and the intersection of the corresponding points of potential diagrams is the potential center.

Find a point outside the graph, such as p.

Find something on the map, such as ABCD.

Connect the points on the diagram with the points outside the diagram, such as AP? BP？ cerebral palsy

Expand the connection according to a certain proportion, such as PA' PB' PC'

Finally connect A' B' C' D with other points? Form a new pattern.