US President Donald Trump has hit out at China's new export controls on rare earths. He's threatening to hit back with "massive" tariffs, and pull out of a possible summit with President Xi Jinping.
Beijing announced plans on Thursday to ban rare earth exports for military use and limit exports of related technologies, including smelting and processing.
Trump slammed the decision on Friday via social media. He is expected to meet Xi at the Asia-Pacific Economic Cooperation forum in South Korea later this month, but said "now there seems to be no reason to do so."
Trump also said his administration is considering a "massive increase" of tariffs on Chinese products.
Rare earths are essential in a range of industries, including electric vehicles.
China has a dominant share of the global market, and the issue is a part of trade negotiations with the United States.

Quiz 1:
What action did US President Donald Trump threaten to take regarding China's new export controls on rare earths?
A. He threatened to limit exports of related technologies.
B. He threatened to impose tariffs.
C. He announced plans for a summit with President Xi Jinping.
D. He said there is no reason to meet President Xi Jinping anymore.

Quiz 2:
Which industry(ies) rely on rare earths, as mentioned in the article?
A. Automobile industry
B. Information technology industry
C. Electric vehicle industry
D. All of the above

Quiz 3:
Why did Trump consider canceling his meeting with President Xi Jinping?
A. China's dominance in the rare earth market.
B. The tariffs imposed by the United States on Chinese products.
C. The new export controls on rare earths by China.
D. None of the above, he did not consider canceling the meeting.

[Answer block]
Answers:
Quiz 1: B
Quiz 2: C
Quiz 3: C