2. Then fold it up, down, left and right! Leave a mark!

3, and then use the mark as a reference line! Fold the four corners in half-then fold the two sides in parallel! As shown in the figure:

Then follow the direction of the arrow. Keep folding!

5. Fold out the picture below.

6. Then unfold the folded one gently!

7. Continue to expand until it is shown in the figure below.

8. Enter the key step. Now put your finger behind point A in the picture, slowly lift it up and operate according to the style shown below.

9. In this way, you fold one side of the box.

10, and then the other party does the same.

1 1, and then fold the upper corner into the box.

12. In this way, another edge is formed.

13, then turn the box around and continue to do the other side.

14, call it a day.