Tools/materials: paper, pen. The method/steps are as follows:
1. First, draw the rough outline of the mask.
2. Then, use diagonal lines to outline the detailed lines on the mask.
3. Then outline the metal strip on the nose.
4. Then add the model number of the mask on the left side of the middle of the mask.
5. Next, outline the lanyard on the left side of the image.
6. Continue to add the lanyard on the right side of the graphic.
7. Finally, add indentations along the edge of the mask. "N" means not oil resistant. "95" means that when exposed to a specified number of special test particles, the particle concentration inside the mask is more than 95% lower than the particle concentration outside the mask. You can see that the n95 protective mask is drawn in simple strokes and the problem is solved.