Generate a strongly designed poster with a diagonal composition. First establish a clear diagonal visual axis, then organize the subject, typography, and negative space around this axis—do not start by piling up decorative elements. The entire image should follow only one primary visual direction; all other elements should only support or balance it, not create new visual competition. The main subject carries the majority of the visual weight. Keep 25%–40% of the composition as negative space. The Chinese title should form a visual focal point, while small English text and date information should be grouped into one or two information zones. Limit the color palette to 2–4 colors, and create tension through scale, cropping, overlapping, and asymmetric layout. The key is not simply to “draw a diagonal line,” but to allow the subject, text, and negative space to jointly form a diagonal reading path.