President Donald Trump warned China on Saturday that it would encounter 'big problems' if it provides arms to Iran, following U.S. intelligence reports suggesting Beijing is preparing such shipments.

Trump made the comments to reporters as he departed the White House for Miami. 'If China does that, China's going to have big problems, okay?' he said, referring to reports of China readying air-defense systems for Iran.

The warning comes amid a fragile two-week ceasefire between the United States and Iran, with peace talks underway in Islamabad, Pakistan. U.S. intelligence, cited by CNN, indicates China plans to secretly deliver weapons, including air-defense systems, to Tehran in the coming weeks.

Earlier this week, Trump threatened 50% tariffs on any country supplying military weapons to Iran. He posted on Truth Social that such nations would face immediate tariffs on all goods sold to the U.S., with no exemptions. The measure targets potential suppliers like China and Russia, which have been accused of aiding Iran's military capabilities.

Trump has credited China with helping persuade Iran to negotiate, telling reporters last week that Beijing played a role in bringing Tehran to the table. However, his latest remarks signal escalating tensions despite that acknowledgment.

The U.S.-Iran conflict has involved extensive airstrikes on Iranian targets, including nuclear sites and military infrastructure. Trump has repeatedly urged Iran to reach a deal, warning of further action if talks fail. The Strait of Hormuz remains a flashpoint, with U.S. efforts underway to clear mines and reopen the vital shipping route.

China has not publicly confirmed any arms shipments. Its Foreign Ministry previously stated that tariff wars have no winners in response to Trump's earlier threats. Beijing has called for de-escalation in the region since the conflict intensified.

The developments underscore the delicate balance in U.S.-Iran negotiations, complicated by third-party involvement. As talks continue, Trump's direct address to China highlights his administration's resolve to prevent Iran from rebuilding its arsenal.