Prompt vidéo de connaissances de 45 secondes, style Vox

Break down the 【theme】 into a 45-second knowledge explainer video, divided into 9 scenes, each about 5 seconds. Requirements: 1. Each scene covers only one core information point 2. Scene order must have a progressive relationship 3. Suitable for Vox-style / encyclopedia collage explainer videos 4. Each scene must be visualizable, not just reliant on subtitles 5. Output: scene title, scene content, voiceover script, key visual elements Case theme: "Qin Unifies China" 9 scenes: 1. Seven Warring States 2. Foundation of the state, feudal lords in division 3. Six states unified, Qin rules all under heaven 4. Standardization of writing 5. Standardization of currency 6. Standardization of measurements 7. Standardization of carriage tracks and roads 8. Great unification 9. Influencing China for over 2,000 years