The copyright protection period was 20 years from the day the author created the work. However, according to the third paragraph of article 21 of the copyright law, the copyright owner can claim rights at the same time, that is, he can exercise the copyright or neighboring rights at the same time. The duration of copyright protection was determined according to the specific circumstances of the work. According to the copyright law, the term of copyright protection for film works and works created by similar methods shall be calculated from the date of creation; music, drama, opera, folk art and other performance works shall be calculated from the date of performance. For literary works, according to the provisions of the first paragraph of article 10 of the copyright law, copyright includes all the rights stipulated by the copyright law and the copyright sharing law, including the right to publish, the right to sign, the right to modify, the right to protect the integrity of the work, the right to translate, the right to compile, the right to adapt, etc. Therefore, the duration of protection needed to be determined according to the specific circumstances of the work.