Core Viewpoint - The construction of various transportation projects in Sichuan is progressing rapidly during the National Day and Mid-Autumn Festival holidays, with a focus on innovation and efficiency in project execution [3][4][5]. Group 1: Transportation Projects - The Chengdu-Ziyang Railway Tianfu Station project has over 800 workers on-site, with multiple construction processes such as metal roofing and interior decoration being carried out simultaneously [4]. - The Chengdu-Ziyang Railway's core traction substation has completed its topping out, marking a significant milestone in the project's electrical engineering phase [5]. - The G5 Jingkun Expressway expansion project has commenced, aiming to complete 900 kilometers of highway construction by the end of the year, contributing to a total highway mileage of over 11,000 kilometers in Sichuan [6]. Group 2: Innovative Construction Techniques - The Tianfu Station project has adopted a novel directional interchange prefabricated box girder technology, which allows for a construction time savings of over two months compared to traditional methods [5]. - The use of Building Information Modeling (BIM) technology in the Chengdu-Ziyang Railway project helps in preemptively addressing structural and pipeline layout issues, thereby reducing construction risks [5]. Group 3: Hydropower and Waterway Projects - The Minjiang River hydropower project at Longxikou has completed its main engineering works, with all nine generator units constructed, and is now focusing on the construction of four dams and associated facilities [7].

Core Points - The completion of the 9.35-kilometer Jiajin Mountain Tunnel on September 28, 2023, marks a significant infrastructure achievement, set to alleviate transportation issues for 110,000 residents during winter months when snow blocks access [1] - The tunnel will reduce travel time across Jiajin Mountain from 1 hour to just 10 minutes, enhancing connectivity in the region [1] - Innovative construction methods, including the parallel tunnel "TBM + blasting method," were employed, achieving a record excavation rate of 50 meters per day in challenging high-altitude conditions [1] Infrastructure Development - The Jiajin Mountain Tunnel connects key revolutionary historical sites and ecological tourist attractions, promoting economic and cultural exchanges between Ya'an City and Aba Prefecture [1] - The construction of the tunnel is part of a broader effort to improve transportation networks in the region, transforming previously treacherous routes into accessible pathways [2]