Hor d’oeuvres, champagne, filet mignon, and a seat at President Xi Jinping’s table — that’s what $40,000 will buy American executives at a welcome dinner for Communist Chinese Party officials at San Francisco on Wednesday. 

Mr. Xi is inviting American corporate leaders to clink glasses and chew on his pitch to bring business to the People’s Republic, whose economy is stagnating as foreign investors lose confidence in the regime. The price of sitting next to the leader of America’s economic rival, though, might be the endangerment of corporate stability and national security.