US blacklists 5 Chinese groups working in supercomputing

The United States is blacklisting five Chinese organizations involved in supercomputing, calling them national security threats and cutting them off from critical U.S. technology.The move Friday by the U.S. Commerce Department could complicate talks next week between President Donald Trump and his Chinese counterpart, Xi Jinping, aimed at de-escalating a trade dispute between the world's two biggest economies.Commerce is putting five Chinese organizations, including supercomputer maker Sugon, on