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China’s Xi Jinping has warned President Donald Trump that their two countries could clash over Taiwan if the issue is not handled properly. That was an unusually harsh admonition that stood in contrast to the American leader’s praise for his counterpart. The exchange Thursday at a highly anticipated summit in Beijing underscored just how far apart Trump and Xi remain on thorny issues, including the war in Iran, trade disputes and Washington’s relations with Taiwan. Taiwan is a self-ruled island that China claims as part of its territory. The exchange also suggested that Trump’s three-day visit to China is likely to be longer on pageantry and symbolism than substantive political or economic breakthroughs.

President Donald Trump says he’s not yet made a decision on whether a major sale of U.S. arms to Taiwan can move forward following his three-day visit to China. The president spoke to reporters Friday as he flew back on Air Force One. Trump's Republican administration has authorized the sale, but it has yet to proceed. Some Republicans in Congress expressed displeasure at the president's comments on weapons to Taiwan. China opposes the deal and has suggested that Washington’s relationship with the self-governing island is the key factor in China-U.S. relations. Trump also says he raised a potential three-way nuclear deal involving the U.S., Russia and China.