This photo shows the CR450BF bullet train in Beijing, capital of China, Dec. 29, 2024. Prototypes of the CR450 bullet train, with a test speed of up to 450 kilometers per hour and an operational speed of 400 kilometers per hour, were debuted in Beijing on Sunday, highlighting China's cutting-edge advancements in rail technology and contributions to the global rail industry. (Xinhua/Ju Huanzong)
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