Tech magnate Hock Tan shelled out $40,000 to sit at Xi Jinping’s table during a high-powered dinner in San Francisco as he awaited approval of a $69 billion deal. The Malaysian-born CEO of Broadcom was one of a number of influential people to dine with the Chinese president, including Apple Inc.’s Tim Cook, BlackRock Inc.’s Larry Fink, and other tech CEOs such as Qualcomm Inc.’s Cristiano Amon. Guests packed into the ballroom at the Hyatt Regency San Francisco on November 20, at one point giving a standing ovation for the Chinese leader. Tan did not have much to cheer about...