深藏于中国的“稀世珍宝”，多国争求技术合作，但都被一一回绝

Core Insights - The article highlights the significance of rhenium, a rare metal crucial for high-tech industries, particularly aerospace, and its strategic importance for China in the global market [1][3][22]. Group 1: Rhenium's Characteristics and Discovery - Rhenium, discovered in 1925, is a rare metal with a melting point exceeding 3180°C and a boiling point of 5596°C, making it stable at high temperatures [3][5]. - Global rhenium reserves are estimated to be less than 3000 tons, with China's reserves exceeding 8% of the total global supply [5][7]. Group 2: China's Rhenium Resources - The discovery of large rhenium deposits in Shaanxi province in 2017 positioned China as a potential leading supplier of rhenium, reducing its previous reliance on imports [5][7]. - This shift allows China to not only meet domestic demand but also to engage in deep processing and export of rhenium, enhancing its technological self-sufficiency [7][22]. Group 3: International Interest and Strategic Decisions - Major countries like the US, Germany, and Japan have shown keen interest in China's rhenium resources, proposing technology exchange agreements [9][11]. - China has rejected these proposals, emphasizing the importance of resource sovereignty and the risks of technological dependency on foreign powers [13][14][16]. Group 4: Domestic Innovation and Future Prospects - The refusal to exchange technology has spurred domestic innovation, leading to significant advancements in rhenium processing technologies [18][20]. - Chinese companies are developing their own single-crystal turbine blades, which enhance engine performance and support the rapid growth of the aerospace sector [20][22]. Group 5: Strategic Importance of Rhenium - Rhenium's applications extend beyond aerospace to nuclear energy, electronics, and high-end manufacturing, making it a strategic resource in global technological competition [22][24]. - Control over rhenium resources is seen as a key to enhancing China's future technological capabilities and global standing [24][25].