Group 1 - The "Jingbin Innovation" shield machine has successfully excavated 3.5 kilometers of the Tianjin Airport No. 2 tunnel, which is a key control project of the Jingbin Intercity Railway [1] - The total length of the tunnel is 8,663 meters, with the shield section measuring 7,510 meters, indicating significant progress in the construction [1] - The project team has implemented advanced construction technologies such as intelligent excavation control and green slurry treatment to address the complex geological conditions and enhance excavation efficiency [1] Group 2 - The Jingbin Intercity Railway is a crucial part of the intercity railway passenger network in the Beijing-Tianjin-Hebei region, with the first phase already operational since December 2022 [2] - Once fully operational, the railway will create a large integrated transportation hub at Tianjin Binhai International Airport, facilitating seamless transfers between air and rail travel [2] - The railway will connect with other lines, such as the Jing-Tang Intercity Railway, further improving the regional transportation network and supporting economic integration in the area [2]