[SMM Analysis: Overseas Supply of Dysprosium and Terbium is Tight, Price Spread Between Domestic and Overseas Rare Earths Widens] On April 4, 2025, the Ministry of Commerce and the General Administration of Customs jointly issued an announcement to implement export controls on seven categories of medium-heavy rare earth-related items, including samarium, gadolinium, terbium, and dysprosium, covering various forms such as metals, alloys, and permanent magnet materials. As the dominant force in the global rare earth supply chain, China controls approximately 85% of the global smelting capacity. These controls directly led to an expansion of the supply gap for medium-heavy rare earths in overseas markets, with key varieties such as dysprosium and terbium being significantly affected.