[THUMBNAIL FINAL STYLE - V2]
Cinematic Vietnamese historical biography poster thumbnail, dramatic sepia-bronze-black palette, aged parchment manuscript texture, smoky battlefield / political conflict atmosphere, strong documentary-history mood.

[COMPOSITION]
Large central historical figure portrait occupying the left or center-left side, waist-up or half-body, dignified expression, historically accurate Vietnamese costume/hat/armor for the period. On the right side, place a large readable Vietnamese title in uppercase gold/ochre brush-calligraphy over an irregular black ink-splash / grunge title panel. Background should blend faded manuscript/calligraphy texture with a dramatic historical conflict scene: soldiers, banners, horses, river boats, court pavilion, smoke, storm clouds, or battlefield silhouettes as appropriate to the story.

[TITLE]
Exact title text: <TITLE>. Use large metallic gold Vietnamese brush lettering with correct diacritics. Title must be readable at small thumbnail size. Stacked words are allowed. High contrast against black ink splash.

[HISTORICAL GROUNDING]
Ground the image specifically in <TIME PERIOD>, <GEOGRAPHY>, <CULTURE>, <COSTUME>, <ARCHITECTURE>, <WEAPONS/TOOLS>, and <MAIN CONFLICT>. Avoid generic fantasy drift and foreign-cultural drift.

[CHARACTER IDENTITY]
Use approved character reference only for identity consistency when applicable: face, age, hair, expression tendency, costume/armor/hat language, and overall khí chất. Do not reproduce the reference sheet.

[NEGATIVE EXCLUSIONS]
Not an airy scene image, not a 65-70% ink-wash window composition, not a plain title card, not a crop from scene image, not a resized frame, not a screenshot, not placeholder, not character sheet, not concept board, not multiple views, not modern objects, not logo, not watermark, not wrong Vietnamese diacritics, not unreadable tiny text.