Books bound by horse riding should not be too thick. Before binding, multiple books must be set into a whole post (see Figure 7-7a). Wire binding is to use a wire stapler to pass the wire through the binding opening of the book block, which is called wire binding. The production efficiency is high, but the iron wire is easy to produce yellow rust spots when it is wet, which affects the beauty of books and periodicals and also forms damaged loose pages. Suitable for binding/kloc-books and periodicals with pages below 0/00. Sewing thread binding is to connect the matched books one by one in sequence according to the thread, which is called sewing thread binding. Sewing machines are often used for sewing. There are two ways to lock the thread: flat lock. Lock-thread binding can bind books of any thickness, which is strong and easy to read, but the speed of binding books is slow. Glue binding: Sticking the book signatures or pages together with adhesive to make the book block. Generally, books are numbered, sawed into grooves or milled into thin sheets on the spine of the book, and bonded firmly with adhesive after bumping. Glued book blocks can be used for paperback or hardcover.