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Constructors work in the Yangtze River tunnel of the Wuhan Metro Line 12 in Wuhan, central China's Hubei Province, July 16, 2025. The 4,011-meter Yangtze River tunnel of the Wuhan Metro Line 12 achieved a tunnelling breakthrough on Wednesday. The 59.9-kilometer metro line is the longest loop metro line in the country. (Xinhua/Xiao Yijiu)
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