In this Feb. 22 file photo, a woman wearing a face mask to help curb the spread of the coronavirus sits near a screen showing China and U.S. flags as she listens to a speech by Chinese Foreign Minister Wang Yi at the Lanting Forum on bringing China-U.S. relations back to the right track, at the Ministry of Foreign Affairs office in Beijing. (AP Photo) BEIJING--The Biden administration has added seven Chinese supercomputer research labs and manufacturers to a U.S. export blacklist in a spreading conflict with Beijing over technology and security. The measure announced Thursday is the latest sign President Joe Biden is sticking to the tough line taken by his predecessor, Donald Trump, toward Chinese tech industries seen by Washington as potential threats.