A worker is pictured inside the "Linghang" large diameter shield tunneling machine at the construction site of the Chongming-Taicang tunnel, part of the Shanghai-Chongqing-Chengdu High-Speed Railway, ...

An interior view of the "Linghang" large diameter shield tunneling machine is seen at the construction site of the Chongming-Taicang tunnel, part of the Shanghai-Chongqing-Chengdu High-Speed Railway, ...

China has reached an engineering milestone with its domestically developed shield machine successfully completing the excavation of an underwater high-speed rail tunnel at a depth of 106 meters below ...