The Wanzhou Yangtze River Bridge uses a unique truss-arch design with a rigid arch and flexible beam. To overcome challenges like complex construction and technical difficulty, the bridge's steel beams are assembled using innovative methods. The side span is built on scaffolding and connected semi-cantilever style, while the mid-span beams are erected with suspension cable towers and full-cantilever techniques. Special equipment like girder erection cranes are used to move and install the steel beams efficiently. Key innovations include temporary abutments, suspension towers, and counterweights to ensure safe and efficient construction.