U.S. President Donald Trump shakes hands with Chinese President Xi Jinping as they hold a bilateral meeting at Gimhae International Airport, on the sidelines of the Asia-Pacific Economic Cooperation (APEC) summit, in Busan, South Korea, October 30, 2025. Evelyn Hockstein | Reuters President Donald Trump is set to meet face-to-face with Chinese President Xi Jinping in a high-stakes summit fraught with risk. The meetings in Beijing, set for Thursday and Friday, could be a watershed moment for the adversarial superpowers, whose fragile relationship has been snarled up by a flurry of economic and political conflicts in the past year alone. The lingering Iran war and a long-standing dispute over Taiwan are also expected to loom large over Trump and Xi's discussions. Each of those thorny issues affects not just Washington and Beijing, but the rest of the world.…