Group 1 - The construction of the longest bridge on the Chengyu Middle Line High-Speed Railway, the Longquan Grand Bridge, was completed on January 26, after 150 hours of beam placement work [2] - The bridge spans 14 kilometers, starting from Longquan District in Chengdu and ending in Longtan Street, and features a 72-meter tied arch structure made of reinforced concrete weighing 6,000 tons [2] - The project utilized 24 high-precision hydraulic jacks with a rated lifting capacity of 600 tons each, along with a PLC intelligent hydraulic synchronization system to ensure precise and safe beam placement [2] Group 2 - The Chengyu Middle Line High-Speed Railway is a crucial part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, with a total length of 292 kilometers and a design speed of 350 kilometers per hour [3] - As of now, 25 tunnels and 47 bridges have been completed in the Sichuan section of the Chengyu Middle Line, with the project expected to be completed and operational by 2027, reducing travel time between Chengdu and Chongqing to 50 minutes [3]