China will complete its first undersea tunnel for high-speed trains by 2025, connecting the Zhoushan Islands in eastern Zhejiang Province with the mainland, according to local authorities.
The project, connecting the city of Ningbo with the island city of Zhoushan, will be 70.92 kilometers in length, including an undersea tunnel of 16.2 kilometers linking Beilun in Ningbo with Zhoushan's Jintang Island, according to the plan. The Ningbo section will be 23.77 km long; the Zhoushan section will be 47.15 km.