Generate a NEW original Vietnamese historical vertical thumbnail/poster for the project title: "NGÔ QUYỀN — TIẾNG SÓNG BẠCH ĐẰNG MỞ LẠI NON SÔNG".

9:16 vertical composition designed for Shorts/reel cover while remaining visually consistent with the main 16:9 thumbnail. Central subject: Ngô Quyền, early 10th-century Vietnamese hero and commander, Vietnamese facial identity, strong healthy build, stern calm eyes, resolute expression, captured at the turning point before the Battle of Bạch Đằng. Use the attached Ngô Quyền reference image for IDENTITY ONLY: preserve face, age tendency, hair, and costume language consistency. Do NOT reproduce a character reference sheet.

Scene concept: one cinematic story scene. Ngô Quyền occupies the upper-middle or center portion, standing on a war boat prow or tidal riverbank with commanding gesture. Below and behind him, the river stakes, foaming tidal water, reeds, war boats, and faint invading fleet create vertical depth. The mood should feel fateful, intelligent, and triumphant before battle.

Visual style: Vietnamese historical ink-wash poster, antique parchment texture, sepia/bronze/charcoal palette, subtle crimson accents, hand-painted brush atmosphere, layered mist, dramatic documentary-poster lighting.

Text in image: include ONLY the Vietnamese title text "NGÔ QUYỀN" in large expressive brush calligraphy placed in the lower third or along one side with clear readability; optional smaller line "BẠCH ĐẰNG 938". No other text.

Composition priorities:
- One cinematic narrative scene, never a reference layout.
- Strong subject silhouette for mobile viewing.
- Preserve room for title readability without covering the face.
- Make the Bạch Đằng stakes and tidal trap understandable even in vertical format.
- Historically grounded early medieval northern Vietnam.

Hard negatives: no character sheet, no turnaround sheet, no concept art board, no multiple views, no front/back pose sheet, no lineup, no floating costume parts, no isolated armor pieces, no design sheet, no modern objects, no photorealism, no anime, no 3D render, no European armor, no Chinese imperial throne scene, no extra text, no watermark, no logo.