Create a vertical 2:3 mid-century-modern travel poster for London, featuring bigben as the unmistakable subject. Use a strict three-color screen-print palette only: warm cream paper, black technical linework and vermilion red. Depict the landmark in a minimalist isometric bird's-eye view, surrounded by a compact, simplified city layout with fine architectural hatching and small accent-color marks on selected roofs and streets. Fill the entire sky with a solid flat accent-color field; use no gradients, photographic textures or extra colors. Add subtle screen-print grain over the cream paper and maintain crisp black contours. At the top, print “London” in bold cream sans-serif lettering, with “东京” in smaller cream text beneath. Preserve generous negative space and a balanced vintage tourism-poster composition. No other text, dates, logos or watermark.
