China's commerce ministry announced new controls on the export of rare-earth technologies and items on Thursday, tightening regulations on a key industry that supplies most countries with critical materials.

China is a leading producer and exporter of rare-earth minerals, which are used to make the magnets crucial to the auto, electronics and defence industries.

Here are all your questions answered on the latest Trump tariffs on China and Beijing's decision to put curbs on rare earth exports.

Q: How much tariff has Trump put on China?

A: Donald Trump has imposed an additional 100% tariff on China as a financial countermeasure for its rare earth restrictions. This is over and above all existing tariffs China is paying.

Q: What is the US tariff on China now?

A: The US tariff on China

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