Can private books be photocopied and published?

Copyright is time-limited, not permanent. The original works of all ancient books in China can't have copyright problems until today, unless you revise the typesetting. This practice, you know, can't be confused with photocopying. Photocopying means printing and publishing ancient books as they are. There is absolutely no copyright problem with this publication. The premise here is ancient books. If it is a modern work, it will involve the issue of copyright. In terms of time limit, as long as the original author dies for 50 years, his works will enter the field of public circulation, and everyone can spread them at will. If this condition is not met, the consent of the author or his immediate family (after the death of the author) must be obtained.