1. First cut the paper into a square with a side length of 15cm. The paper should not be too soft, it is better to be moderate, otherwise the last step is easy to break. It should be noted that all creases should be pressed hard, otherwise it is impossible to achieve half. Fold two diagonal lines.

2. Fold 64 squares, three times horizontally and three times vertically. Be careful when folding in half. For the convenience of description, the side length here is called 8 unit lengths, and each grid is 1 unit length.

3. Fold the four corners. The right-angle side of the triangle with each angle is 2 units. Fold it like this, and the petals of the rose will be white. If you turn the paper over, the roses will be green.

4. Fold three marks in the middle. This step is to fold in half. Fold the four corners on the inside of the folded paper. Think of this as a rectangle with a trapezoid on it. Then fold the rectangle in half as below.

5. The same is true for the other side (perpendicular to the folding direction just now, repeat the above steps). In this way, two groups of "three marks in the middle" are obtained, and a square with an area of 2 square units intersects in the middle of the paper.

6. Fold the central square. Fold the picture in half and then in half.

7. Fold the central structure. Handle the center square to facilitate the following extrusion operation. Pinch a set of opposite "three marks in the middle", gently squeeze the center of the paper and squeeze the center square.

8. Fold the groove (three-dimensional appearance! )。 Fold the flower bottom. Then fold the compressed part to the left away from the "groove" so that the left vertex of the white triangle in the figure rests on the bottom of the left "groove". As you can see, this step makes a small green triangle appear under the white triangle. This step is difficult to understand. Take a good look and think about it. Fold all four directions like this.