Hong Kong (CNN Business)Washington is barring a major Chinese state-owned telecommunications firm from operating in the United States over national security concerns — an action that threatens to once again increase tensions between the world’s two largest economies. The US Federal Communications Commission on Tuesday said it has ordered China Telecom to discontinue US services within 60 days, citing findings that the company’s American subsidiary “is subject to exploitation, influence, and control by the Chinese government.”The company is also “highly likely to be forced to comply with Chinese government requests without sufficient legal procedures subject to independent judicial oversight.” [Wall…