特朗普杀招立竿见影？李在明掏不出4000亿美元，立马反转对华态度

Group 1 - The core point of the article highlights the significant economic pressure the U.S. is placing on South Korea through tariffs and demands for investment, leading to a potential shift in South Korea's diplomatic and economic strategies [3][15][28] - Trump's recent announcement of a 50% import tariff on copper products adds to the existing tariffs on steel and aluminum, affecting the global industrial supply chain and particularly impacting South Korea's economy [7][8][9] - The U.S. demands that South Korea contribute $400 billion to revitalize American manufacturing, which is nearly 80% of South Korea's annual national budget, raising concerns about economic sovereignty [15][17][20] Group 2 - The imposition of tariffs has already led to a decline in South Korea's exports to the U.S. by over 15%, exacerbating the country's economic challenges [20] - In response to U.S. pressure, South Korea is seeking closer ties with China, as evidenced by the recent establishment of a new certificate approval center to facilitate trade between the two countries [22][24] - The new South Korean administration under Lee Jae-myung is showing a pragmatic shift in foreign policy, focusing on improving relations with China while still maintaining a stance on the U.S.-Korea-Japan alliance [24][26]