June 8 news, according to CCTV News reports, today the last immersed tube and the final joint before the closure of the Shenzhen-Zhongshan Link undersea tunnel began floating transport; from its undocking at Niutou Island in Zhuhai to the immersion and installation position at the tunnel site, it must travel 50 kilometers, crossing multiple waterways of the Pearl River Estuary.

The Shenzhen-Zhongshan Link undersea tunnel is 6,845 meters long, of which the immersed tube section is 5,035 meters long and consists of 32 tube elements and 1 final joint. It is the world's longest and widest steel-shell concrete immersed tube tunnel, and can be called an "undersea Great Wall."

This is also the first project in China to adopt a steel-shell immersed tube tunnel structure, and it will build the world's first two-way eight-lane undersea immersed tube tunnel.

The project is a world-class cluster project of "bridges, islands, tunnels, and underground interchanges." It received approval "permission" from the National Development and Reform Commission at the end of 2015 and began construction on December 28, 2016.