It can make the manuscript clean and tidy, which is very helpful for later coloring. After the needle strokes are finished, you can erase the pencil manuscript. With the pencil manuscript, there is a big feeling that watercolor gives the background color. In fact, it is quite effective after paving. Then, if you want to have a more delicate effect, you can use colored lead to further describe the details and overdo it. The more details, the better the picture.