Core Viewpoint - The Sichuan section of the "West-to-East Gas Transmission II" project has been fully put into operation, marking a significant advancement in China's natural gas pipeline construction and expanding the natural gas resource export channels in the Sichuan-Chongqing region [1][8]. Group 1 - The Sichuan section of the West-to-East Gas Transmission II project is approximately 190 kilometers long and has a designed annual gas transmission capacity of 20 billion cubic meters [1][8]. - The project connects natural gas production areas in Sichuan, such as Weiyuan and Luxian, to the national trunk pipeline network, enhancing the link between resource production and consumption markets [1]. - The project is part of China's major energy infrastructure initiative during the 14th Five-Year Plan, contributing to the strategic goal of a trillion cubic meter-level natural gas production base in the Sichuan Basin [3]. Group 2 - The construction of the Sichuan section faced challenges due to the complex terrain of the Sichuan Basin, but advanced technologies such as flexible internal welding machines and argon arc external root welding were employed to achieve a continuous pipeline installation [6]. - The project features unmanned design for key stations, indicating an improvement in the level of intelligent construction for long-distance pipelines in China [5]. - The entire West-to-East Gas Transmission II project spans approximately 4,269 kilometers and is expected to be fully operational by 2027, enhancing the interconnection between coastal LNG receiving stations and inland pipelines [8].