(Bloomberg) -- The U.S. Federal Communications Commission ejected China Unicom Hong Kong Ltd. from the U.S. market, adding to the tally of Chinese telecommunications companies sanctioned by the agency over security concerns. Thursday’s actions on a 4-0 vote follows last year’s FCC action to bar China Telecom (Americas) Corp., and the agency’s refusal two years earlier to let China Mobile Ltd. enter the U.S. market. Thursday’s vote shows potential espionage and data theft by Chinese state-owned companies remains a concern under President Joe Biden after being elevated as an issue by his predecessor President Donald Trump. “There has been mounting...