China strategically slows exports of critical materials used in semiconductor fabrication to Taiwan — germanium and quartz exports to the region also threaten optical and robotics supply chain

China is selectively slowing exports of germanium, quartz, and permanent magnets to Taiwan.

Customs reviews and dual-use export controls are disrupting supply chains for semiconductors, optics, and robotics.

While not a full embargo, the move highlights China’s leverage over strategic industries and Taiwan’s supply-chain vulnerability.