First, prepare materials.
A pair of scissors, a pencil, and a square cardboard I like.
Second, start production.
Diagonal folding square paper-cut.
Continue to fold diagonally again.
Fold back along the center line of the triangle (pictured).
4. Fold the other side back according to the method in step 3.
5. Choose your favorite figure and draw it on paper with a pencil.
6. Cut off the redundant graphics with scissors, leaving only the drawn graphics (this process should be patient and not too fast, otherwise the drawn graphics will be cut off).
7. Expand the graph and you will cut a beautiful axisymmetric graph.