Final answer:
Xi Jinping has been the President of China since March 2013. His presidency is part of a broader context of U.S.-China relations marked by varying degrees of tension and cooperation under different U.S. administrations.
Step-by-step explanation:
Xi Jinping has been serving as President of China since March 2013. The history of modern Chinese leadership includes figures like Deng Xiaoping, who re-emerged as a prominent leader in 1977, and the Chinese government's authoritative stance was evident in events such as the Tiananmen Square massacre in 1989.
The U.S.-China relationship has seen tensions under various U.S. administrations, including President Trump with his trade tariffs and President Biden's tough stances on China, reflecting the global political dynamics entwined with China's leadership.