1. First, take out a square piece of paper and fold the opposite corners of the square paper in half to form a triangle.

2. Then open the triangle and fold the other two corners in half to form a triangle.

3. After opening, a cross crease is obtained, and the corners of the four sides are folded to the center point to form a square.

4. Then turn to the back, fold the crease on one side in half toward the center line, and expose the lower corner at the same time, and also fold the other side in half.

5. Put two big triangles vertically on them, fold the four corners to the crease of the center line, make a triangle, and press the two big triangles down.

6. Then put your finger in, lift it up, and pinch a crease at each corner to form a square, so that the crown is folded.