China Railway 14th Bureau Group

Built World

Boring the Ningbo side with the Yongzhou machine

Eighty meters under the Jintang waterway, a boring machine named Dinghai stopped on Nov. 11 after cutting 6,270 meters of tunnel from the Zhoushan side. Its twin, Yongzhou, is 4,144 meters in from Ningbo and still digging. When the two meet beneath the seabed, expected in 2027, they will finish the shield-driven section of what is planned as the world's longest undersea high-speed rail tunnel.

Updated 1 hour ago