In light of the sensitive and vulnerable environment, and high-toxic, high-acid gas reserves in the northeast area of Sichuan Province, the Project upheld the guideline of environmental first and implemented a construction model featuring energy conservation, environmental protection, eco friendly and low carbon emission. It combined the concept of systemic optimization and technological innovation, incorporated strict supervision into clean production, and promoted the innovation and application of energy conservation and environmental protection technologies throughout the entire process, ranging from optimal design, clean production to environmental supervision. Thanks to the above measures, the Project put an end to large-scale accidents caused by environmental pollution or ecological damages; minimized the negative effects on original eco-environment and local cultural and historical assets, and reached the standards of pollutant concentration, aggregation and environmental quality. As a result, the Project fulfilled its social commitments of making Sichuan-East gas transmission project an eco-friendly project, the Puguang gas field a “Green Gas Field”, and the pipeline a green energy corridor.