China escalates tech battle with US, bans Micron chips in critical infrastructure.

China's cybersecurity regulator, the Cyberspace Administration of China (CAC), has banned Chinese companies from buying chips from US memory manufacturer Micron Technology, citing "significant security risks" to critical Chinese information infrastructure. The ban comes amid an escalating feud over semiconductor technology between the US and China, with the Biden administration moving to restrict China's access to advanced chipmaking equipment. Micron is the largest memory manufacturer in the US, and the Chinese market accounts for about 10% of the firm's annual revenue.