特朗普调整全球关税政策，黄金、钨、铀等关键商品获豁免

Group 1 - The core viewpoint of the news is the adjustment of the U.S. tariff system, which exempts various metals and graphite while including silicon products in the tax list [1] - The new policy will officially take effect on the following Monday, covering key product categories including metals, aircraft parts, generic drugs, and specialty spices that cannot be produced domestically [1] - Gold bars have been explicitly exempted from tariffs, addressing previous concerns about potential import taxes that caused market confusion [1] Group 2 - Key materials such as graphite and tungsten, widely used in aerospace, consumer electronics, and medical devices, have received tariff exemptions [1] - Several pharmaceuticals, including antibiotics, are also granted new tariff reductions, despite being subjects of an ongoing trade investigation by the U.S. Department of Commerce [1] - A procedural change has been introduced to enhance the efficiency of trade agreement enforcement, allowing the U.S. Trade Representative and the Department of Commerce to act directly on framework agreements without needing individual presidential signatures [2]