Chinese President Xi Jinping, left, shakes hands with U.S. President Donald Trump at the Great Hall of the People in Beijing, Thursday, May 14, 2026. (Kenny Holston/Pool Photo via AP) BEIJING — There was a vague agreement that China would purchase Boeing jets and more U.S. soybeans. There was discussion about Iran and opening the Strait of Hormuz, and a nod to other issues, such as cracking down on chemicals used to make fentanyl. But President Donald Trump departed Beijing on Friday with almost nothing concrete to show for his two-day summit with Chinese President Xi Jinping. After months of…