Editor’s Note: Sign up for CNN’s Meanwhile in China newsletter which explores what you need to know about the country’s rise and how it impacts the world. CNN  —  The US government has imposed fresh export controls on the sale of high tech memory chips used in artificial intelligence (AI) applications to China. The rules apply to US-made high bandwidth memory (HBM) technology as well as foreign-produced ones. Here’s everything you need to know about these cutting-edge semiconductors, which have