2. The pattern is outward, and the four corners are diagonally folded.

3. Leave one corner and the other three corners open.

4. For the diagonal of this corner, stick the top of the diagonal to the position where the suture is taken out from this corner and fold a new line.

5. Similarly, fold all corners and open all creases, as follows.

6. Take the sides of two adjacent corners and fold them into triangles.

7. Similarly, other included angles are also folded in.

8. Take one of the corners and fold the sideline to the right.

9. Fold the corner edges of other corners in the same way.

10. Press out the border along the folded triangle.

1 1. Press the extruded triangle and edge together.

12. After inserting the last corner, a closed gift box is made.