美伊谈判突然延期，特朗普：将禁止伊朗石油买家与美做生意

Group 1 - The core message of the articles revolves around President Trump's threat to impose secondary sanctions on any country purchasing Iranian oil, coinciding with the postponement of the fourth round of indirect US-Iran negotiations [1][2] - Trump stated that all purchases of Iranian oil or petrochemical products must cease immediately, warning that any country or individual continuing such purchases would lose eligibility for any form of commercial dealings with the US [1] - The US Energy Information Administration (EIA) reported that in October 2022, China absorbed nearly 90% of Iran's crude oil and condensate exports, highlighting the significant reliance of Iran's economy on oil exports [1][2] Group 2 - The negotiations aim to limit Iran's nuclear program in exchange for the lifting of some economic sanctions, marking a critical turning point in US-Iran relations after decades of hostility [2] - The Iranian negotiating team is led by Foreign Minister Abbas Araghchi, while the US representative is Middle East envoy Steve Vitkoff, indicating high-level diplomatic engagement [2] - The current geopolitical climate is tense, with ongoing military actions by the US against Iranian-supported Houthi forces in Yemen, further complicating the situation [2]