Transportation industry accounts for 16% of global greenhouse gas emissions, with the processing and manufacturing of raw materials as emission hotspots. At the same time, the steel and aluminum smelting industries are major contributors to China's industrial carbon emissions. The automotive industry urgently needs to innovate and explore pathways for collaborative carbon reduction with suppliers, to incentivize and accelerate the innovation and application of low-carbon green technologies, and to drive the low-carbon transition of steel and aluminum enterprises. With the support of the Energy Foundation, IPE conducted research on the 'Collaborative Decarbonization of Automotive, Steel, and Aluminum Green Supply Chains'. The research focuses on engaging the automotive industry to set and disclose supply chain carbon reduction targets, implement low-carbon procurement requirements, and incentivize hard-to-abate industries such as steel and aluminum smelting to accelerate the production and supply of low-carbon products, thereby assisting the automotive industry's decarbonization process, supporting China's 'dual carbon' goals, and contributing to global climate change governance.