Michael Pillsbury, a top China adviser to Mr. Trump during his first term, said Beijing was most likely waiting to see what the deals that the Trump administration reaches with other nations such as India and Japan look like before engaging directly. “They don’t want to start the formal talks because they want to know the bottom line from others first,” said Mr. Pillsbury, who speaks to U.S. and Chinese officials. He noted that the trade fight has become a major point of national pride for China and that it believes that Mr. Trump’s demands — which Beijing does not fully grasp — will soften as American markets gyrate and midterm elections in the United States draw closer. “Delay is very much in their interest, and a speedy deal is very much in Trump’s interest,” Mr. Pillsbury said