Trump-Xi summit: Trade, Taiwan and Iran on the table at high-stakes Beijing meeting US President Donald Trump's highly anticipated visit to Beijing on

Trump-Xi summit: Trade, Taiwan and Iran on the table at high-stakes Beijing meeting US President Donald Trump's highly anticipated visit to Beijing on Wednesday comes at a restless moment for a world worried about war and trade disputes. Trump has said he will have a "long talk" about Iran with Chinese leader Xi Jinping and will also discuss US arms sales to Taiwan. Here's what to know about the summit.