Minimalist flat illustration poster in a naive, hand-drawn style.
Full-bleed composition: the artwork fills the entire canvas edge-to-edge, with no white border, no frame, no margin, no poster mockup, no paper edge, no rounded corners, and no canvas padding.
The image should appear as a digital illustration itself, not a photographed or printed poster.
Color logic is derived from the city and its landmark, not from arbitrary design colors.
The upper 70% of the canvas is a muted Beijing winter sky tone:
