Generate a high-end vertical Chinese poster with a 4:5 aspect ratio, themed 【City Name Impression】. 【Series positioning】 This is not an ordinary tourist map or an attraction guide map, but a “high-end poster of urban culture, cuisine, travel and style impressions.” The overall feel should be premium, refined, cultural, and with a travel-style vibe, like a collectible city-impression poster. 【Main title】 Use large Chinese characters: “【City Name】 Impression.” The title style should be well-designed, refined and high-end, leaning toward modern neo-Chinese or a high-end urban culture poster; not tacky, no overly exaggerated scenic calligraphy, not too cartoonish. Below it, a one-line subtitle: “【short subtitle】,” in a simple, small, neat Chinese font, creating the layout feel of a high-end travel poster. 【Core image】 In the center is a single 3D city-map diorama with its edges fully visible. The map must not fill the whole image; keep margins around it, and the edges and thickness must be clearly visible so it reads as a three-dimensional city model — like a refined miniature city diorama, a 3D terrain model, or an urban impression installation. 【Map structure requirements】 The interior should reasonably fuse: 1. city landmark buildings; 2. representative districts or historical-cultural areas; 3. natural landforms or water systems; 4. representative cuisine; 5. lifestyle or cultural-experience scenes. Note: proportions of buildings, roads, rivers, mountains, greenery, bridges and blocks must be reasonable; do not mindlessly fill blanks with many trees, to avoid a fake feel; the interior should have real urban-structure logic, showing spatial layering, urban texture and core character; the 3D map should be refined, believable, and detailed when zoomed in. 【Content organization】 Mark content directly on the map, without large info cards on the left and right. Use a few refined small Chinese labels, vertical small signs, landmark markers or small plaques to mark: landmark names, food names, cultural-experience names. The marking system should be unified, restrained, tidy and high-end. Avoid too many fragmented labels and avoid looking like an ordinary guide map or scenic flyer. 【Landmarks and city content】 Emphasize: 【landmark list】, 【cuisine list】, 【lifestyle / cultural-experience list】. Integrate these naturally into the map rather than piling them up stiffly. 【Food presentation】 Food is only an accent of city flavor, shown as small, refined, restrained close-ups of tableware or plating embedded in parts of the map. Food must not be too large, must not steal the show, and must not look like an e-commerce detail image. The focus is the “city impression,” not a “food poster.” 【Style requirements】 Overall style: high-end urban culture poster; 3D miniature city map; urban travel-style compendium; refined, unified, collectible; combining cultural, travel and flavor feel; high-end Chinese poster typography; no childish cartoon feel; no ordinary tourist-flyer feel; no info-card pile-up feel; not too yellow, no excessive warm-yellow filter. 【Color requirements】 The overall base color follows the direction of 【main base color】, with an overall tone that is clear, restrained and refined. 【Auxiliary color】 and 【accent color】 may be used for local emphasis. Colors must not be chaotic or over-saturated; keep it unified, high-end and pleasant to look at over time. 【Background and white space】 Keep the background clean; you may use elegant paper texture, faint cloud patterns, urban-flavored line art, or muted decorative motifs as a backdrop. The background must not be too heavy or steal the show. The whole poster should have breathing room and white space. 【Quality requirements】 Must be high-definition, sharp and rich in detail, supporting zoom-in. All buildings, districts, roads, rivers, terrain, food tableware and label text should be as clear as possible. Overall it should be more refined, more high-end, and more like a finished design than an ordinary AI poster.