Upload JPG, PNG,JPEG images of 600X800 pixels and no more than 5M; 2. The cover of the work should display the title of the work and the pen name; 66663. Please be sure to use original pictures, and it is strictly forbidden to use real photos, pictures of copyrights of others and other pictures that may infringe the legitimate rights and interests of third parties, so as not to cause disputes; 4. It is strictly forbidden to upload pornographic, violent, advertising or unsuitable pictures for the public, and once discovered, it will be banned books;