The day the U.S. Department of Commerce announced measures to strengthen export controls on semiconductors shipped to China — Oct. 7 — will probably go down in memory as 10/7, just as the day of the Sept. 11 terror attacks in the United States is remembered as 9/11.

This illustrates how extremely significant the event is, representing a turn of the tide in U.S.-China relations. To explore this issue, we can focus on how U.S. economic security is situated in the framework of confrontations with China.

Economic security