Line sketches can be said to be the first step in painting, line sketches are the skeleton, color is the flesh and makeup, bones are ready, just wait for you to pick up the paint, give these line sketches flesh and makeup again. Many beginner watercolor readers who have no art foundation encounter difficulties in the first step of making line drafts in watercolor painting. This book is a collection of watercolor coloring tutorials and line drafts. The cases in the book involve watercolor coloring tutorials for plants, animals, food, objects and figures, basic line drawing teaching and line filling, which can be used as color filling exercises or line copying. Make it easy for zero-base readers to draw complete watercolors. The collection includes 50 highly completed illustrations, which are both visually enjoyable and hands-on.