Beijing has announced sweeping trade curbs against the United States, including export controls on drones and a ban on dealings with six American entities, in retaliation for recent US restrictions on Chinese tech.

BEIJING -- China has decided to tighten controls on the export of drone-related dual-use items to the United States, the Ministry of Commerce said on Wednesday.

China announced on Wednesday a raft of measures in response to restrictions imposed on Chinese companies by the United States, including placing six US entities on its…