Aug. 28 (UPI) -- After a visit this week by National Security Advisor Jake Sullivan, the United States and China agreed, among other things, for President Joe Biden and Chinese leader Xi Jinping to speak by phone. The White House on Wednesday described Sullivan's two-day talks from Tuesday to the following day with China's foreign minister Wang Yi as "candid, substantive, and constructive," according to a readout of his meeting with Chinese officials. Advertisement On Wednesday, the