How to make a storage box by hand?

Prepare a square piece of paper with a side length of 15cm, put the color face down, fold the four corners of the paper in pairs, and then unfold it. Then turn the paper over, fold it in half on all sides, and then unfold it. Pick up the paper and fold it into a double triangle with the crease just made. Determine the position from the top corner 1 cm, and then fold the top corner down to this position. Then fold the left and right corners of the front layer upward so that the two corners are aligned with the creases just made. Now fold the left and right corners in the middle inward to the vertical edges on both sides. Turn the paper over and repeat it on this side. Then fold the top of the right flip down along one side of the small triangle to form a crease. Restore. Then fold it down to form a horizontal crease. Repeat the above operation for the left flip. Carefully open the pockets on both sides and stuff the small corners in. Fold the top corner downward to form a horizontal crease and restore it. Pick up the origami model from the table, carefully put one or two fingers in the opening and unfold it. Straighten all the edges, then press the creases in place to make the shape of a box. Beautiful square storage box, origami finished!