This series is divided into two volumes. The manuscript is selected from the author's many years of line drawing flower sketches, and the well-known peonies are selected and presented in the form of line drawings. Each volume selects twenty line-drawing flower works, using concise and simple lines to outline the different forms of flowers - including bud form, blooming state, and withered form. The sketching style is both varied and harmonious, fully demonstrating the expressive power of traditional meticulous painting. The book also intersperses some sketches of the author's painting process, as well as experiences and reflections, expressing the author's humanistic feelings. The publication of this book is not only a summary of the author's many years of painting experience, but also provides reference and inspiration for beginners in line drawing.