特朗普求情没用，40艘货轮驶向中国，800万吨粮没有一粒来自美国

Group 1 - The core issue is the significant decline in U.S. soybean exports to China, leading to an accumulation of soybeans in U.S. storage facilities [3][5][11] - President Trump's request for China to increase soybean purchases by four times reflects the urgency of the situation, as U.S. farmers face unsold stock [3][5] - The trade tensions initiated by the "tariff war" have disrupted the traditional soybean trade between the U.S. and China, prompting China to seek alternative suppliers from South America [5][9][16] Group 2 - China has already secured soybean orders from South America, with approximately 8 million tons confirmed for September, indicating a shift away from U.S. soybeans [9][11] - The current soybean prices in the U.S. are declining, yet there are still few buyers, exacerbating the situation for American farmers [11][13] - China's diversification in trade relationships and the potential for increased orders from Argentina suggest that the U.S. may struggle to regain its market share in the soybean sector [13][16][18]