The copyright protection period of a photographic work was 20 years from the date of creation. The term of copyright protection for audio and video recordings may vary according to the regulations of different countries and regions, but most countries 'laws provide that the longest term of protection for audio and video recordings is 20 years, calculated from the date of creation. It should be noted that the term of copyright protection is not unlimited. If the author does not make a declaration or authorization within the term of protection to copy, distribute, perform, show, broadcast, and information network transmission without the permission of the copyright owner, it may constitute an act of copyright violation.