1. Place the business card flat on the desktop, making sure the text is facing down.

2. Fold the business card in half, from the short side to the long side, so that the upper and lower edges are aligned.

3. Fold the business card in half again from the middle position, with the upper part folded down and the left and right edges aligned.

4. Fold the left corner in the middle direction so that it is parallel to the bottom edge. Similarly, fold the right corner in the middle direction so that it is parallel to the bottom edge.

5. Fold down the top corner to align it with the bottom edge. This forms an isosceles triangle. Gently adjust each folded part to form a three-dimensional triangle.