Elon Musk's rocket company SpaceX has allowed Chinese investors to buy stakes through offshore hubs like the Cayman Islands.Investment from China raises national security concerns due to access to sensitive military technology, intelligence, or supply chains.Details emerged through testimony in a recent corporate dispute, revealing the company's approach to conceal foreign ownership interests.There is no public record of SpaceX undergoing a formal review by the Committee on Foreign Investment in the United States (CFIUS).