1, prepare a notebook paper, as shown in the following figure:
2. Fold the square above into a double triangle, as shown in the figure below:
3. Align both sides with the center line, as shown in the following figure:
4. Hold the middle by hand and press down, as shown in the figure below:
5. Fold the small triangle at the top to the opposite side, as shown in the figure below:
6. Fold the wing of the plane below, as shown in the figure below: