The document analyzes conventions of film posters through examining posters for the movies Annabelle, The Boy, and Finders Keepers. It finds that typical conventions include a main image related to the plot, the title in bold font, and a tagline hinting at the film's content. For example, Annabelle's main image features the titular doll to set the horror genre, while The Boy's ambiguous main image and tagline intrigue viewers. The document concludes the poster for "Pengyuelan" should feature the main doll character alongside the two protagonists, with the title at the bottom as seen in other successful posters.