BEIJING — President Trump shook hands with Chinese leader Xi Jinping Wednesday to kick off a historic summit between the world’s two most powerful heads of state. Trump and Xi stood shoulder-to-shoulder outside China’s Great Hall of the People, a massive Communist Party showpiece overlooking Tiananmen Square, during the lavish arrival ceremony .  The handshake marks the seventh face-to-face between Trump and Xi and the pair’s first meeting in China since November 2017.  U.S. President Donald Trump shakes hands with Chinese President Xi Jinping upon arrival at the Great Hall of the People in Beijing, China, May 14, 2026.…