Flat illustration, Oriental fantasy style high-end city poster design, vertical 9:16 co...

Flat illustration, Oriental fantasy style high-end city poster design, vertical 9:16 composition, the overall adopts a diagonal + S-shaped flowing composition, extending from the bottom left to the top right, the picture uses deep black as the background, gradually changing from top to bottom to intense dark red, forming a strong cold-warm contrast and spatial depth, the background has a faint stardust and grainy texture. In the center of the picture, a golden flowing energy line winds through like a flame, extending from the bottom to the top, having a fluid texture, particle light effects and gradient highlights, with subtle energy debris and volumetric light in some areas. Guangzhou city landmark building complexes emerge layer by layer in the golden flowing light: Canton Tower is the visual core, with a prominent proportion, surrounded by t

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