The ban is part of a longer effort by the U.S. government to crack down on U.S. contributions to Chinese artificial intelligence and high-performance computing, or supercomputing. Last year, U.S. officials put seven Chinese supercomputing entities on an economic blacklist, and last week they banned Nvidia and AMD's chips from export to China "to keep advanced technologies out of the wrong hands." On Thursday, an independent group that measures artificial intelligence speeds published new data that can help back up the claims of little-known Chinese startup Shanghai Biren Intelligent Technology Co that its latest chip has bested the performance of...