This combination of file photos shows China's President Xi Jinping, taken in Bangkok, Thailand, on Nov. 19, 2022, and Ukrainian President Volodymyr Zelenskyy taken outside Kyiv, Ukraine, on April 7, 2023. Chinese leader Xi talked Wednesday, April 26, 2023, with Ukrainian President Zelenskyy by phone and appealed for negotiations in Russia's war against his country, warning "there is no winner in a nuclear war," state media said, in a long-anticipated conversation after Beijing said it wanted to act as peace mediator. (AP Photo, File)