Trump threatens to impose additional 100% tariff on China

chairperson Donald ruff has threatened to draw come out of an expected meeting with his Chinese counterpart Xi Jinping, signalling a flare-up in trade tensions between the two economic giants that sent shares in the US tumbling.

In a post on social media, Trump hit back at Beijing's move earlier this week to tighten its rules for exports of rare earths, accusing China of "becoming very hostile" and trying to hold the world "captive".

He said he saw "no reason" to meet with President Xi later this month, and later on Friday threatened an additional 100% tariff on Chinese goods as well as export controls on "critical software".

The new measures against China will take effect on 1 November, Trump said.

Financial markets dropped in the wake of Trump's remarks, with the S&P 500 closing down 2.7%, its steepest fall since April.

China dominates production of rare earths and certain other key materials, which are key components in cars, smartphones and many other items.

The last time Beijing tightened export controls - after Trump raised tariffs on Chinese goods early this year - there was an outcry from many US firms reliant on the materials. Carmaker Ford even had to temporarily pause production.

In addition to tightening rules for rare earth exports, China has opened a monopoly investigation into the US tech firm Qualcomm that could stall its acquisition of another chipmaker.

Although Qualcomm is based in the US, a significant portion of its business is concentrated in China.

Beijing has also said it will charge new port fees to ships with ties to the US, including those owned or operated by US firms.

"Some very strange things are happening in China!" Trump wrote in a post on social media on Friday. "They are becoming very hostile."

The US and China have been in a fragile trade détente since May, when the two sides agreed to drop triple-digit tariffs on each others' goods that had nearly stopped trade between the two countries.

The move left US tariffs on Chinese goods facing an added 30% levy compared with the start of the year, while US goods entering China face a new 10% tariff.

Officials have held a series of talks since then on matters including TikTok, agricultural purchases, and the trade of rare earths and advanced technology like semiconductors.

The two sides were expected to meet again this month at a summit in South Korea.

China expert Jonathan Czin, a fellow at the Brookings Institution, said Xi's recent actions were a bid to shape the upcoming talks, noting that the recent rare earths directive does not go into effect immediately.

"He's looking for ways to seize the initiative," he said. "The Trump administration is having to play a game of whack-a-mole and deal with these issues as they come up."

He added that he did not think China was worried about US retaliation in response.

"What China took away from the Liberation Day tariffs and the cycle of escalation followed by de-escalation is that the Chinese side had a higher pain threshold," he said. "From their perspective, the Trump administration blinked."

In prior rounds of trade talks, China has pushed for looser US restrictions on semiconductors. It is also interested in securing more stable tariff policies that would make it easier for its businesses to sell into the US.

Xi had previously used as leverage his country's dominance of rare earths production.

But the export rules unveiled this week target overseas defence manufacturers, making them particularly serious, said Gracelin Baskaran, director of the critical minerals security program at Washington-based Center for Strategic and International Studies.

"Nothing makes America move like targeting our defence industry," she said. "The US is going to have to negotiate because we have limited options, and in an era of rising geopolitical tension and potential conflict, we need to build our industrial defence base."

While a Trump-Xi meeting now looks unlikely, she said it was not necessarily completely off the table. Ms Baskaran said there's still time and room for talks. China's new rules don't take effect until December.

"Negotiations are likely imminent," she said. "Who does them and where they happen will be determined with time."

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