Two traders said, China has booked at least eight boatloads, or 480,000 tonnes worth $173 million, of Brazilian soybeans last week. And a drop in Brazilian soybean prices sparked fresh demand from commercial soy importers. Trump said on Twitter on Sunday that China has already begun making U.S. agricultural purchases. But three U.S. soybean exporters said there have been no U.S. sales to China since last week's talks in Washington, and none have been confirmed by the U.S. Department of Agriculture. （Source: Reuters）