President Donald Trump has launched a fierce attack on "predatory" trade practices, warning trading partners at the World Economic Forum in Davos that the US will not tolerate unfair trade.
He said these predatory practices were distorting markets and the US "will no longer turn a blind eye".
Mr Trump said he would always put the US first when it came to trade, but "that does not mean America alone".
"The US is open for business," he told the world's finance leaders.
Our correspondents say his America First policy seems to be in contradiction to the conference's aim to promote globalisation and co-operation.
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Mr Trump lauded the economic achievements of his first year in office, including cutting corporation tax and lowering the unemployment rate, and said the US was more attractive than ever to foreign investment.
"I'm here to deliver a simple message - there has never been a better time to hire, to build, to invest and to grow in the United States. America is open for business and we are competitive once again," he said.
As he was talking, the figures for US economic growth were released, showing growth of 2.6% in the fourth quarter of last year - but it falls short of the president's 3% target for that period.
When the US president was taking questions after his address, he attacked the media and repeated accusations of them reporting "fake news".
"As a businessman I was always treated really well by the press… and it wasn't until I became a politician that I realised how nasty, how mean, how vicious and how fake the press can be," he said.
Mr Trump has had a universally positive reception, with cheers on his arrival on Thursday in the main Congress Centre.
On Thursday, he met UK Prime Minister Theresa May, who said they stood "shoulder to shoulder" in facing shared military threats.
He has also reportedly said he is prepared to apologise for retweeting posts from a British far-right group last November, a move that sparked a Twitter row with Mrs May.
