On the facts of the case, the Chinese court, in a case of first impression, held that copyright did not subsist in six sets of prompts submitted to Midjourney and hence the copying of those prompts could not infringe copyright. However, the court suggested that there could be copyright in a more elaborate and specific set of prompts that meets copyright’s standard for originality.
Source: Copyright in AI Prompts: Chinese Court Ruling on Generative AI and Originality