China operates the most extensive high-speed rail network in the world, with more than 24,855 miles of operational lines, according to a 2023 report from the International Union of Railways.
BEIJING (Reuters) - Chinese AI developer DeepSeek said it spent $294,000 on training its R1 model, much lower than figures reported for U.S. rivals, in a paper that is likely to reignite debate over ...
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