Oriental Tea Commercial Poster Design

Output a single 4:5 vertical commercial poster, no collage, no multi-grid. Use an original fictional brand, do not imitate existing brand packaging, logos, or ads. Text should only use the brand name, main title, and category explicitly listed in the prompt; do not add prices, awards, parameters, dates, origins, or slogans. The image must reach a completion level suitable for creative direction review, with realistic structure, credible materials, clear layout, and no watermarks. Theme: Oriental Tea Review Sample. Original brand 'Lan Xu', product 'Rock Tea' (Yancha), main title 'Mountain Field Entering Cup'. A vertically long sheet of warm-white Xuan paper folds upward from the bottom into three folded pages of different heights, resembling abstract mountain ridges while retaining real paper thickness, fibers, and creases. Place a small dark brown teapot on the lowest layer, a white porcelain tea cup on the middle layer, and only a few dried rock tea leaves on the highest layer; object scales are realistic and non-overlapping. Core composition: 'Binding Fold Pages - Mountain Path Layers - Tea Smoke Connection'. A wisp of amber tea smoke rises from the spout, travels along the folded mountain paths connecting the tea cups, resembling restrained ink wash writing with local density variations but not forming specific characters or dragons/phoenixes. Main title 'Mountain Field Entering Cup' is arranged vertically in modern Song typeface on the right whitespace, small text 'Lan Xu' at the top, small text 'Rock Tea' at the bottom. Color palette: warm white, rock brown, tea soup amber, and minimal ink black. No people, ancient costumes, real tea room scenes, full-screen landscapes, large calligraphy, gold borders, Zen clichés, complex packaging, or multiple collages.