China’s purchase of “double-digit billions” in American agricultural products touted by US officials following President Donald Trump’s state visit to Beijing appears to be a marginal addition after factoring in previous commitments, analysts said, adding that new orders could reduce the country’s reliance on Brazil for soybeans and other items.US Trade Representative Jamieson Greer said on Friday that he expects to see China buy a 10-figure sum in agricultural products annually over the next...