Two Chinese nationals and two U.S. citizens have been charged with a scheme to illegally export advanced Nvidia chips to China in violation of U.S. export controls, the Department of Justice said on Nov. 20.In a file photograph, the logo of Nvidia Corporation during the annual Computex computer exhibition in Taipei, Taiwan, on May 30, 2017. Tyrone Siu/ReutersLi Cham, 38, a California resident, and Chen Jing, 45, who resides in Florida on an F-1 nonimmigrant student visa, are the two Chinese nationals accused of the illegal exporting scheme. The two U.S. citizens are Ho Hong Ning, 34, a Florida resident...