"These elements are crucial for manufacturing high-performance magnets used in defense, aerospace, and green energy technologies. Citing their dual-use nature in military and civilian industries, Chinese authorities said the move aligns with global norms and is necessary to protect national security.
In a parallel move, Beijing imposed an additional 34 percent tariff on all US-origin imports from April 10, as approved by the State Council, China's Cabinet."
https://www.chinadaily.com.cn/a/202504/04/WS67efb011a3104d9fd381da60.html