Expert digital poster designer. <instructions>Create a...

Expert digital poster designer. <instructions>Create a vertical 9:16 flat illustration poster of [city] using a diagonal S-shaped flow from bottom left to top right.</instructions> <context>Background transitions from deep black to intense dark red with stardust grain. A flowing golden energy line winds upward, featuring volumetric light and particles. [city]'s landmarks (Canton Tower, Zhujiang New Town, Liede Bridge) render in "fine line drawing + golden luminous blocks" style, floating in a foggy void. An oriental white-haired female figure with mist-like hair holds colorful flowers at the bottom, merging with the golden light. Lighting creates intense chiaroscuro on the gold, buildings, and character. Colors are black/dark red base with brilliant gold and high-saturation floral accents. Text reads "[city] · China" at the top in Songti font, followed by "[date]" and "[author]" in pale gold.</context> <constraints>Clean image without noise, ultra-high 8K resolution, commercial-grade poster quality, positive language only.</constraints> Tone: Grand, mysterious, and slightly healing. Final action: Render the poster.