Group 1 - The West-to-East Gas Transmission Project's third line, specifically the segment from Zhongwei to Zhaoyang, has officially commenced operations, enhancing natural gas supply capabilities in China's central and eastern regions [1] - The newly operational segment is 1,235 kilometers long, with a designed pressure of 10 MPa and a diameter of 1,219 mm, capable of transporting 25 billion cubic meters of gas annually [1] - This project connects existing gas pipeline systems, expanding the gas supply network to key economic regions such as the Yangtze River Delta, Pearl River Delta, Bohai Rim, and Sichuan-Chongqing area, thereby optimizing energy distribution and supporting regional economic growth [1] Group 2 - The Chongqing Caiyuanba Yangtze River Tunnel for the Yuxia High-Speed Railway has successfully completed its shield tunneling section, marking a significant milestone for the project's timely completion [2] - The tunnel is a critical control project for the Yuxia High-Speed Railway, featuring a total length of 11,942 meters, with the shield tunneling section measuring 3,845 meters [2] - This project is notable for being the first high-speed railway large-diameter shield project in China to complete the entire process of shield machine assembly, initiation, reception, and disassembly underground, addressing significant technical challenges [5] Group 3 - The successful rotation of the bridge on the Huhuo Railway's He-Wu section was completed, demonstrating advanced engineering capabilities [6] - The bridge spans 97.1 meters and weighs 6,000 tons, with construction occurring in close proximity to an operational railway, presenting high safety risks and technical challenges [8] - Once completed, the Huhuo Railway's He-Wu section will reduce travel time between Wuhan and Hefei from 2 hours to 1 hour, enhancing the railway network in the Yangtze River Economic Belt [8]