The main bridge in Lu’an is a double-deck truss single-pylon cable-stayed bridge with double-cable planes, featuring a span arrangement of 98 m + 105 m + 255 m + 300 m = 758 m. The structural system is a semifloating system with longitudinal restraints. The main girder is a composite steel truss structure comprising two transverse main trusses spaced at 26.1 m. The main trusses adopt a triangular (Warren) configuration, with a truss height of 10 m and a panel length of 15 m. The upper deck consists of an orthotropic steel deck, while the lower deck comprises an orthotropic composite deck. The pylon is designed as a water-drop-shaped tower with a total height of 164.670 m. A total of 32 pairs of stay cables is arranged in a spatial double-cable-plane fan configuration using steel strands with a standard tensile strength of 1,860 MPa. The basic cable spacing is 15.0 m along the deck and 2.5 m along the pylon. The stay cables are anchored at the girder ends using steel anchor boxes, while a combined anchorage system consisting of steel anchor beams and circumferential prestressing (directly anchored into the pylon walls) is employed at the pylon ends.