3191.HK is trading at HK$85.42, up +4.40% on September 21, 2026, as AI infrastructure demand remains the primary catalyst for a broad China semiconductor rebound.

  • SMIC, memory-chip, and semiconductor-equipment shares were among the strongest performers; SMIC said AI-related orders supported production, while prices for sought-after capacity increased.
  • Expectations for renewed U.S.-China discussions on AI, trade, and critical minerals supported sentiment, though the move appears primarily sector-driven rather than tied to a single company announcement.