Jintang undersea tunnel of Ningbo-Zhoushan Railway under construction in China's Zhejiang

Technicians from China Railway 14th Bureau Group Co., Ltd. operate a crane inside the "Yongzhou" shield tunneling machine in the Jintang undersea tunnel of Ningbo-Zhoushan Railway in east China's Zhejiang Province, May 29, 2025. At a depth of 64 meters underground, the "Yongzhou" shield tunneling machine started the boring work for the undersea section of the Jintang undersea tunnel of Ningbo-Zhoushan Railway on Thursday.

The 16.18-km Jintang undersea tunnel under construction connects the Jintang islet of Zhoushan and the coastal area of Ningbo in Zhejiang Province and is an important facility for a high-speed railway line connecting cities of Ningbo and Zhoushan in the province.