中美北京谈判在即，特朗普掀桌失败，美国大豆中国说不买就不买了

Group 1 - The trade of soybeans between China and the U.S. is facing significant uncertainty, with Chinese importers signing contracts for at least 25 shipments of Brazilian soybeans for delivery in March and April, coinciding with Trump's planned visit to China [1] - Brazilian soybeans are cheaper and more abundant than U.S. soybeans, leading to a shift in Chinese purchasing behavior, as they have recently stopped buying U.S. soybeans in favor of Brazilian options [3] - The U.S. is experiencing severe weather conditions that have increased logistics costs for transporting soybeans, while Brazil is expected to achieve record soybean production due to favorable weather [3] Group 2 - The U.S. Treasury Secretary praised China's commitment to fulfilling soybean and rare earth supply agreements, but later indicated potential tariffs on China if trade agreements exceed previously announced terms [3] - China's recent support for Cuba, including the donation of rice and solar power equipment, may become a bargaining chip in future negotiations with the U.S. regarding soybean orders [5] - The cost difference between Brazilian and U.S. soybeans is becoming more pronounced, with Brazilian soybeans facing a 3% tariff compared to a 13% tariff on U.S. soybeans, further complicating U.S. market competitiveness [3]