Photocopy books. It is a unique publishing form in China to photocopy the original and then publish the photocopied version. Photocopying foreign English books or orphan books is very cheap, and the distribution of such books is usually restricted. Because it is too expensive to buy the original, in order to save money, after obtaining the copyright authorization, it was completely copied, and the copyright was marked as the original publishing house. Most of them are English books or ancient books