Before 1976, copyright protection required that copyright works must be notified to or registered by the copyright office when they were published. The first protection period of copyright is 28 years from the date of protection. When the copyright expires, it can be renewed. The Copyright Law of 1976 extends the extension and renewal period of the copyright that is still valid on 1978 65438+ 10/day from 28 years to 67 years.

For works published or registered before 1 964 65438+1October1,the copyright must have been extended in the 28th calendar year to enjoy the extra protection space of 67 years. The copyright amendment issued by1June 26th, 992 will automatically extend the second protection period of works that first enjoyed copyright between196465438+1October 30th and197765438+February 30th.