Line is one of the indispensable forms of painting art,as an important painting element,he has always occupied a pivotal position in the history of chinese art,and has unique views on it in the history of western art.In realistic painting,lines exist mainly as a tool to generalize the outline of an object.But in the original art,the medieval art,the modern art,the line itself performance is relatively independent.Until the advent of abstraction,lines were truly liberated from the pic-ture.