Sun Tzu is a honorific title bestowed upon Sun Wu, the author of The Art of War, an immensely influential ancient Chinese book on military strategy. Sun Tzu believed in the use of the military sciences to effect outcomes that would result in peace. In the author's name, Sun Wu, the character wu, meaning "military", is the same as the character in wu shu, or martial art. Sun Wu also has a courtesy name, Chang Qing (Cháng Qing).