1. Fold the square paper diagonally; 2. Fold the right corner along the bottom edge to form a right triangle; 3. Open the previous step to form a crease; 4. Fold the right corner Fold to the left, paying attention to the points on the left side of the crease; 5. Also fold the left corner to the right; 6. Fold the top part down along the edge of the cup; 7. Turn it over to the back and fold it down again; 8. , pick up the paper cup and pinch out the shape; 9. You're done.