The mega-diameter tunnel boring machine "Fenji" is launched in Tongzhou Bay Demonstration Zone, Nantong, East China's Jiangsu Province on March 31, 2026. With a total length of 145 meters and a weight of about 3,800 tons, the machine boasts a cutterhead diameter of 14.33 meters and is equipped with multiple intelligent systems, according to media reports. Photo: cnsphoto