The specific steps are as follows:

1, prepare a square piece of paper.

2. Fold into a rectangle.

3. Fold it into a square again.

4. Finally fold into a triangle.

5. Select the position of the paper center and start drawing.

6. Draw half a villain.

7. Finally, cut the paper according to the edge of the villain and unfold it to become the finished product.

By cutting villains with axisymmetric knowledge, we can understand the relationship between folding times and the number of villains. Solving the problem of holding hands requires not only hands, but also finding key points through observation and thinking. Thinking process from image to abstraction.