Under Trump and more so under Biden, the US has cut off China from access to cutting edge chip technology. Given the importance of these chips to both research, AI, military weapons, and even some high end consumer products, some has called this an "act of war". NYTimes article below details the issue. Have to wonder if visits by senior US officials are a sufficient offset or what they discuss with the Chinese.
‘An Act of War’: Inside America’s Silicon Blockade Against China
The Biden administration thinks it can preserve America’s technological primacy by cutting China off from advanced computer chips. Could the plan backfire?
www.nytimes.com