1. Prepare two square pieces of paper with different sizes, one of which needs to be longer than the other 1cm. The big one is the box cover and the small one is the box body. The folding method of the two pieces is exactly the same.

2. Fold one of the squares along the diagonal, then expand it and restore it to a square.

3. Fold the four corners of the square to the center point to form a small square.

4. Fold the four sides of the small square in half toward the center line, and press out a deep crease.

5. Open a pair of diagonal corners of the small square, and the other two diagonal corners stand along the crease, perpendicular to the ground.

6. Bend the two opened diagonal corners upward along the crease, then fold them inward and flatten them. The packing box is half finished.

7. Fold the other square in the same way. When two small boxes are buckled together, it is an exquisite packaging box.