16:9 horizontal Vietnamese historical illustration on warm antique paper, centered ink-wash scene, clean negative space. Scene about Lý Nam Đế and Vạn Xuân: Ông là người mở cánh cửa.. 6th-century Giao Châu, ancient Vietnamese villages, banners, rivers, mountains or marshland as appropriate. Muted sepia watercolor, charcoal lines, dignified cinematic composition, historically grounded. No text, no labels, no watermark, no modern objects, no fantasy armor, no guns.