4天之期已到！中国打响造船业保卫战，美国没猜到，中方又出奇招

Group 1 - The core viewpoint of the article highlights China's strong retaliatory measures against the U.S. maritime policies, including imposing special port fees on U.S. vessels docking in China and sanctioning South Korean companies that assist the U.S. [1][3][10] - China's Ministry of Transport has initiated a survey to assess the impact of U.S. Section 301 measures on the shipping and shipbuilding industries, indicating a structured response to perceived threats [4][14] - The retaliatory actions are characterized as a comprehensive strategy, targeting not only U.S. interests but also third-party collaborators, thereby sending a clear message about the consequences of siding with the U.S. [7][12] Group 2 - The special port fees for U.S. vessels will be charged based on tonnage and will increase annually, reflecting a firm stance on reciprocal measures [3][9] - The sanctions against the five U.S. subsidiaries of Hyundai Heavy Industries are a direct response to their involvement in supporting U.S. investigations against China, emphasizing the importance of protecting national interests [10][12] - The measures taken by China are designed to safeguard its supply chain and maintain its competitive edge in the shipbuilding industry, while also allowing for exemptions to avoid harming international partners [9][14]