1, when doodling, draw the face first, then draw the skin color (light brown pigment) on the face with a fine pen, and then draw the eyes, nose and mouth with Gou Xianbi (when drawing small parts such as eyes, nose and mouth, use Gou Xianbi, dip less pigment to prevent the pen tip from seeping down, and draw slowly, which is the key to making fine products. )。

2. For places with different colors but adjacent to each other, first use Gou Xianbi as a sign to separate the areas, and don't paint a large area.