In response to Biden tightening the screws on China. This doesn't appear to be tied to any threats of future tariffs by Trump.
https://apnews.com/article/china-us-tec ... a3937fa939
"The U.S. Commerce Department has expanded the list of Chinese technology companies subject to export controls to include many that make equipment used to make computer chips, chipmaking tools and software.
The 140 companies newly included in the so-called “entity list” are nearly all based in China. But some are Chinese-owned businesses in Japan, South Korea and Singapore.
The revised rules were posted Monday on the website of the U.S. Federal Register for publication later this week. They also limit exports of high-bandwidth memory chips to China. Such chips are needed to process massive amounts of data in advanced applications such as artificial intelligence.
China’s Commerce Ministry protested and said it would act to protect its “rights and interests,” without giving any details."