What is the standard for determining the ownership of film and television works in China's Copyright Law?

China's Copyright Law defines the ownership of film and television works as follows: the copyright of film works and works created by methods similar to filming shall be enjoyed by producers, but writers such as screenwriters, directors, photographers, lyricists and composers shall enjoy the right of authorship and the right to receive remuneration according to contracts signed with producers. Authors of works that can be used independently, such as scripts and music, in cinematographic works and works created by methods similar to cinematography, have the right to exercise their copyright alone. Article 15 of the Copyright Law: The copyright of a film work and a work created by a method similar to filming shall be enjoyed by the producer, but writers such as screenwriters, directors, photographers, lyricists and composers shall enjoy the right of authorship and receive remuneration according to the contract signed with the producer. Authors of works that can be used independently, such as scripts and music, in cinematographic works and works created by methods similar to cinematography, have the right to exercise their copyright alone.