除了断供镓和锗，东大还有一张王牌，打出来西方将伤筋动骨

Group 1 - The Chinese government announced export controls on gallium and germanium, causing concern in the U.S. as they have no gallium stock and limited germanium processing capabilities [1][3] - The real strategic asset for China is rare earth elements, which have been developed over decades, with significant contributions from scientist Xu Guangxian [3][5] - Xu Guangxian developed a more efficient method for separating rare earth elements, drastically reducing costs and increasing production efficiency, leading China to dominate the global rare earth market by the 1980s [5][8] Group 2 - Rare earth elements are critical for modern technology and defense, with China controlling nearly half of the global reserves and over 90% of refining capabilities [8][10] - The U.S. is significantly behind in rare earth processing technology, with a gap of about 20 years, which poses a risk to its defense capabilities [10][12] - Recent export controls by China are seen as a response to U.S. actions that threaten China's economic interests, highlighting the strategic importance of rare earths in global supply chains [12][15]