China bans exports of key microchip elements to US as trade tensions escalate

Gallium and germanium are used in semiconductors, while germanium is also used in infrared technology, fibre optic cables and solar cells. Antimony is used in bullets and other weaponry, while graphite is the largest component by volume of electric vehicle batteries...

https://www.theguardian.com/world/2024/dec/04/us-china-microchips-export-bans-gallium-germanium