Production costs generally refer to equipment costs, personnel costs, transportation costs, art costs, special effects costs and so on. Publicity expenses: publicity expenses generally include making posters and trailers and tidbits, hard advertisements, cinema terminal materials, media promotion, ground activities, premieres, hiring naval forces, and bribing film critics. Distribution costs mainly include copy production costs, cinema public relations and negotiation costs. Strictly speaking, the box office share of cinemas is also part of the distribution cost.