1. First make the shape and draw the outline of the lips, paying attention to the shape of the upper and lower lips. Also draw the outline of the exposed teeth. Then lay down a layer of tone on the visible dark parts to facilitate in-depth characterization later.

2. To draw the texture on the upper and lower lips, first draw the approximate lines of the texture. Then draw the projection of the lower lip to express a sense of volume.

3. Deepen the dark parts of the lips and deepen the shadow of the lower lip. Apply a layer of gray tone to both the upper and lower lips, paying attention to leaving white and highlight areas.

4. Use a pen and paper to erase some areas to make the color less heavy, such as the edge lines of the upper lip. Then use a sharp eraser to rub some lines on your lips.

5. To carry out in-depth characterization is from quantitative change to qualitative change. Continue to deepen the texture of the upper lip and deepen the tone. At the same time, draw the teeth and use the relative light and shade to express the dark and light parts.

6. Use the same method to depict the lower lip, but the lower lip should have more highlights, a more glossy feel, and a lighter tone. The method of painting is universal. In this way, the drawing method of sketching lips is completed.