2. Fold up the lower left corner along the diagonal of the square.
3. Expand to get the trace, and then fold the left side to the crease to get the center intersection.
4. Spread and fold horizontally.
5. After the crease is obtained, unfold it and fold the corners on the right side in the middle crease.
6. Upper and lower edges, and then fold in half at the middle crease.
7. Then fold it in half at the middle crease.
8. Spread the upper layer, and you will find a horizontal crease on it.
9. Fold the upper part back along the crease.
10, the two corners are folded into a right-angle style along the vertical crease.
1 1, then open it and see a square on the side.
12. Fold the square out of the track and fold it in half at the vertical diagonal.
13, the trace is broken on both sides.
14. Then, fold it back. Fold the two corners near the middle crease to both sides.
15, then unfold it and fold this angle inward along the crease.
16, after folding, similar to the steps of origami.
17, left and right edge creases are folded inward.
18. Turn it over and fold the top inward along the inclined crease.