This photo taken on Aug. 21, 2023 shows the shield-tunneling machine at the construction site of China's longest expressway shield tunnel project, in Beijing, capital of China. (Xinhua/Ju Huanzong)
China's longest expressway shield tunnel drilled through
China drilled a tunnel through for expressway transport in Beijing on Monday. It is the longest expressway tunnel in the country created using the shield-tunneling method.
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