借口“安全”，NASA禁中国公民参与项目

Core Viewpoint - The article highlights NASA's recent decision to prohibit Chinese citizens holding U.S. visas from participating in its projects, reflecting escalating tensions in the U.S.-China space race and concerns over national security [1][3]. Group 1: NASA's Actions - NASA has confirmed the implementation of internal actions restricting access for Chinese citizens, including limitations on physical and cybersecurity access to its facilities and networks [3]. - Previously, Chinese citizens with U.S. visas could participate in NASA's research as contractors, graduate students, or university researchers, but this access has now been revoked [1][3]. Group 2: U.S.-China Space Competition - Both the U.S. and China plan to complete manned lunar missions within the next five years, intensifying the competition between the two nations [3]. - NASA's recent statements indicate a heightened concern over the possibility of China landing on the moon before the U.S., showcasing a sense of urgency and anxiety within the agency [3]. Group 3: Expert Commentary - An expert from the Diplomatic Academy noted that China's rapid advancements in aerospace have created unprecedented pressure on the U.S., revealing a lack of confidence and anxiety in the U.S. regarding technological competition [3]. - The expert criticized the U.S. approach of using exclusionary measures to maintain its technological edge, arguing that such actions could hinder innovation rather than promote it [3].