China:
According to Articles 20 and 21 of the current "Copyright Law" in China, except for the right to attribution, the right to revision, and the right to protect the integrity of works, all statutory rights of Chinese citizens over their works expire on December 31st of the fiftieth year after the author's death. After exceeding the copyright protection period, their works enter into public domain (public copyright). Books that have lost publishing rights, adaptation rights and other copyrights due to an author's death exceeding 50 years are called "public domain books", or simply "public version books".