Publication time is the day when articles and periodicals are printed and bound and officially released. Cover refers to the outer layer of books and periodicals. Sometimes it refers to the first side with the title, author or editor, name of the publishing house, etc. From Ba Jin's "Home" XI: "My grandfather just gave me a thread-bound book. I read the title of the book with a white cover:" Mr. Liu teaches filial piety to abstain from prostitution "and felt a headache."

Cover refers to the name of the bound book block wrapped in a coat. Cover is also called book cover, cover, outer cover, etc. , and divided into one, two (cover), three, four (back cover). Generally, one cover of books and periodicals is printed with the title, publisher and author, and the other four covers are printed with copyright.

Cover plays a role in beautifying books and protecting book blocks. At the same time, it is very convenient to find books and periodicals in the library.

Function of cover

As an advertisement, the cover is usually in an editorial department, and the production of the cover is relatively a good "fool" thing. Originally, the production of the cover usually belongs to the later stage, usually after the film is released. When time is tight, it is inevitable that you will not pay much attention.

The operation of the media is more about the quality of manuscripts and pictures. Compared with them, they also have many kinds of evaluation methods, but they have never heard of any specific requirements for the cover. Since there is no standard, of course they have to "improvise".