The US president released a statement on Monday night saying he had asked his trade advisers to identify additional Chinese products on which to impose new tariffs.

"These tariffs will go into effect if China refuses to change its practices, and also if it insists on going forward with the new tariffs that it has recently announced," he said.

"If China increases its tariffs yet again, we will meet that action by pursuing additional tariffs on another $200 billion of goods. The trade relationship between the United States and China must be much more equitable."

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The US tariffs already announced affect more than 800 Chinese products worth $34bn in annual trade. They are due to come into effect on 6 July.

The product lines range from aircraft tyres to turbines and commercial dishwashers.

The White House said it would consult on tariffs on the further $16bn of products, and would apply these later.