Tunnel boring machine Dinghai unveiled in Changsha, C China

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A drone photo taken on Jan. 10, 2024 shows an unveiling ceremony of the tunnel boring machine (TBM) Dinghai at an industrial park of China Railway Construction Heavy Industry Corporation Limited in Changsha, central China's Hunan Province. With a diameter of 14.57 meters and a total weight of 4,350 tonnes, the TBM Dinghai will be used in the construction of Jintang undersea tunnel linking the Jintang islet of Zhoushan and the coastal area of Ningbo. (Xinhua/Chen Sihan)