Workers are on duty at the construction site of the Huafu mega bridge at the Sichuan-Chongqing section of the Chongqing-Kunming high-speed railway in southwest China's Chongqing Municipality, Nov. 28, 2022. The 699-kilometer-long Chongqing-Kunming high-speed railway with a designed speed of 350 kilometers per hour is a key constituent of the railway corridor linking China's capital Beijing and Kunming in southwest China's Yunnan Province. [Photo by Wang Quanchao/Xinhua]
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