Aug. 29 (UPI) -- U.S. National Security Adviser Jake Sullivan met Thursday with Chinese President Xi Jinping to discuss a number of issues as part of ongoing efforts to manage the bilateral relationship and keep communication channels open. The White House said that both sides "welcomed onging efforts to maintain open lines of communication," a focus of Sullivan's visit as the United States and China are also planning a call between President Joe Biden and Xi "in the coming weeks."