Group 1 - The Xiapu Bridge is the world's largest road-rail dual-use bridge and a key control project for the Ningbo-Zhoushan Railway, which will end the history of no railway access in Zhoushan City [1] - The bridge features a dual-layer design with a railway in the middle and roads on both sides, including a double-track railway and a six-lane dual-direction road [1] - The construction involves over 30,000 tons of steel structures, which are being divided into 138 intelligent modules with a precision control of within 2 millimeters [1] Group 2 - The intelligent manufacturing base at China Railway Baoji (Zhoushan) Co., Ltd. employs smart welding robots and other automated equipment, significantly enhancing production efficiency by over 40% [2] - The welding quality is crucial for the safety and performance of the bridge, with weld seams being evaluated at a level comparable to that of a senior welder [2] - The integration of "artificial intelligence+" welding technology allows for precise identification of welding positions and immediate alerts for any issues detected [3] Group 3 - The bridge utilizes a cable-stayed suspension system, necessitating precise control of steel structures due to varying stress points across different segments [3] - In 2022, China Railway Industry established a large-scale, intelligent steel bridge manufacturing base in Zhoushan, enhancing China's capabilities in steel bridge manufacturing [3]

Core Viewpoint - The G2 section of the Guangzhou-Shenzhen Expressway expansion project has commenced steel box girder manufacturing, marking the full production phase for this critical infrastructure project in the Guangdong-Hong Kong-Macao Greater Bay Area [1] Group 1: Project Overview - The Guangzhou-Shenzhen Expressway is a vital part of the national expressway network, specifically the Beijing-Hong Kong-Macao Expressway (G4) and the Shenyang-Haikou Expressway (G15), and is recognized as a "golden corridor" in the region [1] - The key line of the project, the elevated bridge from Taiping to Wudianmei, involves a steel structure manufacturing volume of 72,000 tons, which is being undertaken by China Railway Shanhaiguan Bridge Group [1] Group 2: Technological Innovations - The project team employs CNC cutting technology to ensure precision in part dimensions, automated assembly, and intelligent welding technology to guarantee assembly accuracy and welding quality [2] - Laser technology and AI vision technology are integrated into the manufacturing process, enhancing performance across multiple manufacturing stages, including weld seam recognition and coating inspection [2] - The implementation of a digital welding management system and real-time information exchange during the manufacturing process aims to improve automation, digitization, and intelligence in the production of bridge steel structures [1][2] Group 3: Commitment to Quality - The company emphasizes strict quality control across production, technology, and project timelines to deliver a high-quality outcome for the Guangzhou-Shenzhen Expressway expansion project [2] - The project aims to contribute to the development of modern transportation infrastructure that is convenient, efficient, green, economical, and safe, supporting the Greater Bay Area and the national transportation strategy [2]