Generate a 15-second 4K technical video for Xuan'ao plastic running tracks. Open with raw materials close-up (eco-friendly polyurethane particles, rubber granules), then cut to high-speed mixing, precision hot press molding, and laser dimensional inspection. Include quick shots of engineers adjusting parameters and lab technicians doing wear-resistance tests. Technical yet accessible tone, no background music—only factory ambient sounds. Add continuous rolling English subtitles at bottom center: white Arial font with black outline, slow right-to-left scroll, 0.5s delay between segments. Subtitle content: 1. Xuan'ao Plastic Track Raw Materials 2. Eco-Friendly Material Mixing 3. Precision Hot Press Molding 4. Laser Dimensional Inspection 5. Wear-Resistance Testing 6. Xuan'ao: Professional Sports Surfaces