美报告承认：检查了92台中国起重机，安全得很

Core Viewpoint - The journey of the "Zhenhua 29" cargo ship symbolizes the peak of globalization, which may be coming to an end due to rising tensions in U.S.-China trade relations, particularly concerning Chinese-manufactured port cranes viewed as a national security threat by the U.S. government [1][12]. Group 1: Shipping Journey and Logistics - The "Zhenhua 29" completed one of the longest shipping routes globally, taking three and a half months and covering nearly 20,000 nautical miles, transporting five giant port cranes from Shanghai to various ports in the U.S. and Jamaica [1][11]. - The ship's first stop was Gulfport, Mississippi, after a journey that included navigating through the Indian Ocean and crossing the Atlantic Ocean, highlighting the complexities and dangers of transporting such large equipment [5][16]. - The ship's route was complicated by restrictions at the Panama Canal, requiring it to take a longer path to accommodate the cranes' extended arms [14][15]. Group 2: Industry Context and Market Dynamics - China currently accounts for over 70% of global port crane production, with approximately 80% of cranes used in U.S. ports sourced from China [6][17]. - The U.S. government has proposed a 100% tariff on Chinese-manufactured port cranes, citing national security concerns, which could disrupt supply chains and increase global shipping costs [9][20]. - The U.S. port and terminal operators have expressed that the popularity of Chinese cranes is due to their availability and lower prices, and the proposed tariffs may not effectively address the underlying supply issues [10][20]. Group 3: Political and Economic Implications - U.S. officials have raised unfounded security concerns about the technology in Chinese cranes, suggesting they could be used for espionage, which has been refuted by Chinese officials and contradicted by U.S. Coast Guard inspections that found no security vulnerabilities [8][12][18]. - The U.S. has been criticized for its unilateral and protectionist measures, which may ultimately harm global trade and supply chain stability rather than revitalize its domestic manufacturing sector [10][20].