The first method: flip the paper box.

1. Take 1 A4 paper, fold the short side in half, and cut off the rectangular side to form 1 square paper.

2. Fold it into rectangular paper along the center line of the square paper, and then fold it into small square paper with the center line.

3. Unfold the small square paper, align the four corners along the crease with the crease intersection, and fold it into a new square paper.

4. Fold the folded square paper into three equal parts, fold the four sides to press the crease respectively, and unfold it into hexagonal paper.

5. Fold the hexagonal paper inward along the crease into four sides of the carton and the lid, and finally stick the sub-surface of the carton to one side of the lid with glue.

The second method: heart-shaped paper box

1. Square red paper is folded in half with diagonal line and center line respectively to obtain square paper with "m" crease.

2. Fold the four corners into a square along the "M" crease, turn the paper over, align it with the center line, fold the opposite side, and then unfold it.

3. Turn the paper over again, and the triangles that are not folded in half on both sides are folded outwards, and the top corners are aligned with the edges.

4. Unfold the origami, aim at the crease of the center line, fold the two sides of the triangle inward respectively, and unfold the paper into hexagonal paper.

5. Turn the paper upside down, the hexagonal paper will be folded at right angles by 2/3, then the crease will be compacted and the paper will be unfolded.

6. Turn the paper over again and push the paper in with creases to form one side of the heart-shaped carton.

7. Push inward again along the crease and fold it into an M-shaped heart-shaped carton surface.