Biden and Xi seek to manage tensions in phone call as US officials head to China

Joe Biden and Xi Jinping have clashed in a telephone call about Taiwan and US trade restrictions on technology, but sought to manage their tensions, as two top US officials prepare to visit Beijing. The nearly two-hour telephone conversation on Tuesday was the two leaders' first direct interaction since a summit in November in California that saw a marked thaw in tone, if not the long-term rivalry, between the world's two largest economies. The treasury secretary, Janet Yellen, will leave Wednesday and visit both Guangzhou, the southern city emblematic of China's manufacturing power, and Beijing, with Secretary of State, Antony…