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🇨🇳BREAKING: Researchers in China achieved internet transmission speeds fast enough to download 20,000 4K movies in ONE SECOND. The team set a world record in optical fiber transmission by achieving the world’s FIRST real-time, two-way transmission over 1,000 km of hollow-core fiber. The 1,007.48-km link carried 64 terabits per second in each direction simultaneously, equivalent to 160 movies per second in each direction at 50 GB per movie. A signal crossed 1,000 km in just 3.43 milliseconds. Light travels through the fiber’s hollow center, cutting travel time by about 30% compared with conventional glass fiber. This is a massive breakthrough, especially for AI data centers hundreds of kilometers apart, where latency and bandwidth between facilities directly affect the efficiency of large-model training and inference.