China hits back at US sanctions on tech giants, restricts exports to 10 American defense firms

China imposed export controls on 10 US companies involved in defence and rare earths mining in response to Washington's blacklist, and banned public procurement from dozens more firms, Beijing said Monday. China's finance ministry simultaneously announced a ban on agencies involved in public procurement from buying products made by 46 US firms, including Lockheed Martin, Raytheon and Boeing's defence division.