Ukraine: Biden urges Xi not to back Russian aggression

US President Joe Biden on Friday warned his Chinese counterpart that Beijing would pay a steep price if it supports Russia's invasion of Ukraine. During the phone call with Chinese President Xi Jinping, Biden laid out the "implications and consequences" if Beijing backed Russia's attack, according to the White House. "The president underscored his support for a diplomatic solution to the crisis," the White House said. "The two leaders also agreed on the importance of maintaining open lines of communication, to manage the competition between our two countries." The almost two-hour call between Biden and Xi comes at a time…