Goes to show why it might be a bad idea to rely on outsiders for precious materials.
Just be thankful that this didn't happen during anything important.
You simply can't have everything in one country. Those downvoting do you even know what logistics, supply chain management, economics, r&d or trade is? LOL no country on earth is fully self reliant. Human beings trade, even animals trade. You can't get rare metals from China, you have to get them from somewhere else. Do you think rare metals are summoned into existence by waving a wand? Why don't you find oil in your backyard then. So amusing
We've got plenty of oil. Plenty of rare metals, and aside from that, China is hardly the only source, they just have the fewest qualms about miners' safety and environmental impact.
Just be thankful that this didn't happen during anything important.