U.S. President Donald Trump and China's Xi Jinping are set to meet on Friday to ​wrap up a two-day state visit that has featured pomp and business deals but also a warning from Xi that mishandling the Taiwan issue could send relations spiraling. 

Trump is on the first visit by a U.S. president to China, America's main strategic and economic rival, since his last in 2017, and has been seeking tangible results that might improve his dented approval ratings ahead of crucial midterm elections, Reuters reported.