According to CoinMeta, the U.S. Treasury Department has officially proposed a ban on investing in AI companies from countries such as China, Russia, Iran, North Korea, and Cuba. The proposal covers transactions in the fields of chips, quantum computing, supercomputing, supersonic technology, and biotechnology, and combines a comprehensive ban with transaction notification requirements. Publicly traded stocks are exempted, and transactions below $50,000 can bypass the notification rules. Public comments will be open until December 7th.