Create a vertical 9:16 vintage commemorative postage stamp poster for "{{commemoration}}", with the main title "{{title}}", date "{{date}}", denomination or commemorative number "{{denomination}}", and tagline "{{tagline}}".

The image must look like an officially issued collectible postage stamp or first-day-cover poster: classic perforated stamp teeth on all four sides, a thin gold decorative inner border with corner ornaments, premium paper with fiber texture and subtle aging grain. Include an upper-right date block, circular commemorative postmark, diagonal cancellation lines, lower-left or lower-area denomination, a thin gold divider line near the bottom, and a short commemorative copy layout.

Main visual: {{subject}}. The main visual should feel like a treasured illustration or commemorative image preserved on the stamp canvas, with optional subtle white sticker outline, watercolor bleed, golden ink traces, or shallow embossed layering. Do not rely on any external reference image. The main visual must relate directly to "{{commemoration}}" and blend naturally with the stamp border, date, postmark, and title.

If the commemoration comes from a game, film, IP, or fictional world, preserve recognizable character identity, world location, element/faction, costume family, weapon/prop, title, and commemorative-event signals, then organize them into the stamp's main visual, postmark, denomination, date block, and commemorative copy instead of replacing them with a generic original character.

The main title "{{title}}" should be the visual focus: large vertical Chinese calligraphy, gold-foil inscription, elegant serif lettering, or themed commemorative typography. If it is Chinese lettering, render warm metallic gold foil with thickness, brush texture, inked edges, and dimensional highlights where possible. Add a small amount of Chinese-English or Chinese-Japanese explanatory copy, issue number, release information, and commemorative text, but keep the main text clean and avoid large blocks of garbled writing. Palette and material direction: {{palette}}.

The layout should be elegant, vintage, airy, and collectible, with clear hierarchy between border, postmark, denomination, date, title, and main visual. Emphasize print collectible quality, gold-foil stamping, paper texture, and slight age. Do not make a normal festival poster, normal character illustration, magazine cover, or e-commerce card; do not lose the perforated stamp and commemorative stamp elements.