威胁无效之后，美财长准备第四次关税谈判，邀中国去西班牙马德里

Group 1 - The U.S.-China trade war, which began in 2018, has seen multiple rounds of negotiations and tariffs without a clear resolution, with the fourth round of talks planned [4][10] - The U.S. Treasury Secretary's recent remarks indicate a softening stance towards China, acknowledging it as the world's second-largest economy and the largest source of the U.S. trade deficit [5][12] - The agricultural sector, particularly soybean farmers, is under pressure due to a lack of new orders from China, which could lead to significant financial losses for U.S. farmers [6][10] Group 2 - The trade conflict has evolved into a prolonged struggle, characterized by numerous negotiations and tariff increases, with both sides experiencing domestic pressures [10][13] - The U.S. has attempted to rally European allies to apply pressure on China, but has faced challenges in achieving substantial actions from G7 countries [12] - China's position remains firm, expressing willingness to negotiate while also being prepared for confrontation, signaling a long-term strategy in the trade dispute [13]