韩美推动建造核潜艇，中方表示关切：希望韩方慎重处理相关事宜

Group 1 - The core point of the articles is the recent agreement between South Korea and the United States regarding trade and security, which includes significant investments and military cooperation [1][2] - The "Joint Fact Sheet" released by both countries outlines a framework for trade agreements, including South Korea's commitment to invest $150 billion in the U.S. shipbuilding sector and an additional $200 billion as part of a strategic investment memorandum [1] - The agreement also includes the U.S. approval for South Korea to build nuclear-powered submarines, with a commitment to closely cooperate on related issues such as fuel procurement [1] Group 2 - China has expressed concerns regarding the South Korea-U.S. nuclear submarine cooperation, emphasizing the need for South Korea to handle the situation cautiously due to its implications for global nuclear non-proliferation and regional stability [2] - The discussions also cover the modernization of the South Korea-U.S. security alliance, with South Korea planning to increase its defense spending to 3.5% of GDP and invest $25 billion in U.S. military equipment by 2030 [2]