US President Donald Trump says he warned China against supplying weapons to Iran, and Chinese President Xi Jinping responded with a claim he was "not doing that."

Axar.az reports that Trump made the remarks in an interview with Fox Business.

"He responded to a letter that I wrote because I had heard that China is giving weapons to — I mean, you're seeing it all over the place — to Iran," Trump told "Mornings With Maria" on Wednesday.

"And I wrote him a letter asking him not to do that, and he wrote me a letter saying that essentially he's not doing that."

"China is very happy that I am permanently opening the Strait of Hormuz," Trump posted Wednesday to Truth Social after the interview aired. "I am doing it for them, also – And the World. This situation will never happen again.

"They have agreed not to send weapons to Iran," Trump added.

Trump also said he did not expect shifts in the global oil market over the war on Iran and changes in Venezuela to impact the dynamics of his planned meeting with Xi next month.

"He's somebody that needs oil. We don't," Trump said.

The two leaders are prepping for a meeting soon, and Trump expects a warm greeting from Xi, he added in his Truth Social post.

"President Xi will give me a big, fat, hug when I get there in a few weeks," Trump wrote. "We are working together smartly, and very well! Doesn’t that beat fighting???"

"BUT REMEMBER, we are very good at fighting, if we have to – far better than anyone else!!! President DJT"