The introduction of the free download of the "Business War" txt e-book presents the rise and fall of a business legend, using classic cases to simulate real business strategies. A one-man company quickly develops into a vast business empire, an impoverished pauper turns into a billionaire. What force creates such a myth? There are many types of businessmen, such as government-business figures, scholar-businessmen, and unscrupulous businessmen, each having their own way of doing business. So what should be the guiding principles for conducting business?