China has expanded its use of critical minerals as a trade weapon with curbs on exports of rare earths, threatening to shake-up the global supply of key materials used widely in high-tech manufacturing from electric vehicles to weaponry.

China said Friday that it will impose reciprocal 34% tariffs on all imports from the United States from April 10, making good on a promise to strike back after US President Donald Trump escalated a global trade war.

The Chinese government said it would match President Trump’s tariff, and also barred a group of American companies from doing business in China.