【WSJ: The U.S. is preparing to take action against its allies' chip factories in China】According to the Wall Street Journal, the U.S. is preparing to take action against its allies' chip factories in China, as part of a broader effort to impose technology export controls against China. The U.S. plans to revoke the exemption licenses for companies such as Samsung, SK Hynix, and TSMC, which currently allow them to use U.S. technology in their Chinese factories without having to apply for permits on a case-by-case basis.