There are many forms of photocopying, such as taking photos, scanning and copying. These three forms are called copies.
Photocopying: It is divided into two forms: thread binding, paperback and hardcover. In the past, photocopying was mostly done in line to keep the quaint features of China ancient books; However, the contemporary trend requires that photocopied ancient books should be in the form of paperback and hardcover.
This can be cheap and convenient to check the house. Photocopyed ancient books can also be punctuated or collated, and some photocopied ancient books have been punctuated or collated.
A copy is no different from the original, it is a copy of the original. Before China joined the WTO, foreign books were collected in the form of photocopying, and now they are all original books.
Thread binding is a stage in the history of book binding in China, and it is the binding form of paperback books which is closest to the modern meaning. Before online binding, the binding forms of books were Bao Beizhuang, butterfly, warp folding and so on.