Yangtze River tunnel of Wuhan Metro Line 12 achieves tunnelling breakthrough

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)

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)

A constructor walks 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)

An engineering vehicle runs 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)