The first navigable channel bridge of the world's longest cross-sea high-speed railway bridge has been closed.

On the evening of October 17, the steel truss girder of the south channel bridge of the Hangzhou Bay Cross-Sea Railway Bridge was successfully closed, making it the first of the three channel bridges of the Hangzhou Bay Cross-Sea Railway Bridge to be closed. The Hangzhou Bay Cross-Sea Railway Bridge is a controlling project of the Nantong-Ningbo High-Speed Railway. It is located upstream of the existing Hangzhou Bay Cross-Sea Highway Bridge, starting from Haiyan in Jiaxing in the north and ending in Cixi in Ningbo in the south, crossing the waters of Hangzhou Bay. With a total length of 29.2 kilometers, it is currently the world's longest cluster-type cross-sea railway bridge under construction and the one with the highest construction standards. The bridge consists of three channel bridgesnorth, central, and southas well as sea viaducts and shallow-water area approach bridges. The south channel bridge closed this time is located in the central waters of Hangzhou Bay, with a total length of 814.5 meters. It adopts a steel truss composite girder cable-stayed bridge structure, with a main span of 364 meters, capable of accommodating 3,000-ton-class vessels.