1. Prepare two square pieces of paper with different sizes, one of which needs to be 1 cm longer than the other, the big one is made into the box cover, and the small one is made into the box body, and 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 towards the center 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 will stand up 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. Half of the packing box has been completed.

7. Make the same folding for the other square. Buckle two small boxes together, and it is an exquisite packing box.