A little-known Chinese tech company saw its stock drop sharply after U.S. authorities charged a co-founder of Super Micro Computer with illegally smuggling advanced AI chips into China, according to Bloomberg. The case is putting fresh focus on how restricted American technology may still be entering the country.The company, Sharetronic Data Technology, quickly denied any connection to Super Micro and said it complies with all hardware purchasing regulations. However, newly surfaced records tell a more complicated story.Those records suggest that Sharetronic procured hundreds of Super Micro systems containing high-end chips from Nvidia Corp.—technology that has been banned from being sold to...