Loose-leaf book is one of the most commonly used stationery in daily work and study, which consists of cover, binder (or coil) and paper. The biggest difference from ordinary notebooks is that loose-leaf notebooks are more flexible to use, the paper can be disassembled, replaced and combined at will, and it is also convenient to organize, and users can also do DIY according to their own preferences. Loose-leaf pages can be used to write notes, take notes and draft.

Hardcover refers to an exquisite book making method. Hardcover books are mainly made on the cover, back and corners of the book block through various modeling techniques. There are many processing methods and forms, such as round back (with or without ridge), square back, square corner, rounded corner and other book blocks. Cover processing is divided into whole surface, bonding surface, Fiona Fang angle, foil pressing, hot stamping pattern, etc.