On September 2 (local time), the U.S. Senate unveiled a preliminary draft of its yearly defense policy proposal, introducing the 'Guaranteeing American Innovation and National Access to Artificial Intelligence Act' (or GAIN AI Act for short). This legislation mandates U.S. AI chip producers to prioritize meeting domestic demand before exporting high-performance AI chips overseas. It explicitly bars the export of the most cutting-edge AI GPUs. The act lays out specific criteria for defining 'advanced integrated circuits' or high-end AI chips, encompassing Total Processing Performance (TPP) ratings, Performance Density (PD) benchmarks, and bandwidth stipulations. Should this act be enacted, it would pose a significant challenge to the international earnings of U.S. AI chip firms, preventing companies such as NVIDIA and AMD from marketing their top-tier AI chips on the global stage.