Hardcover book refers to a delicate method of making books. Hardcover books are mainly made by processing various shapes on the cover, back and corner of the book core. There are various processing methods and forms, such as book core processing, such as round back (ridged or not ridged), square back, square angle and round corner, etc.; cover processing is divided into whole face, joint face, square and round angle, foil stamping, embossing patterns, etc.