Dalian Bay Undersea Tunnel is another cross-sea traffic cluster project with complex technical conditions and high environmental protection requirements after the Hong Kong-Zhuhai-Macao Bridge. The total length of the tunnel is 5.1 kilometers, and the immersed section of the sea consists of a total of 18 immersed tubes.
The lighting system of the Dalian Bay Submarine Tunnel has recently been installed and debugged. The interior of this submarine "dragon" has been lit up all over the line.