Japan was also in the firing line on Monday.
The US president accused the country of currency manipulation, and hinted he might respond with tariffs.
Trump said other countries are deliberately pushing down the value of their currencies to give their economies a competitive advantage. He singled out Japan and China.
Trump said he had phoned Chinese President Xi Jinping and Japanese leaders. He said he told them that they can’t continue to devalue their currencies against the dollar because it’s unfair to the US.
Trump said the easy solution for America is to impose tariffs on its trading partners.
The Japanese finance minister denied that his country has been weakening the yen.
Kato Katsunobu pointed out that the government and the Bank of Japan have intervened to strengthen its currency in the past, most recently last year.