U.S. Treasury Secretary Claims China Cuts Iranian Oil Imports by 40% Amid Sanctions Push

Bessent said, "we are finding watermarks of our U.S. large language models on many of the Chinese models, and that's unacceptable," and indicated the administration would review the issue further in the coming days or week.
If the drop in Chinese purchases of Iranian crude is sustained, it could affect Tehran's export revenues and potentially reshape global oil-market dynamics.
U.S. authorities signaled they will intensify enforcement against sanctions evasion in Iran’s oil trade, including potential actions targeting shipping companies, intermediaries and financial networks involved in the trade.
China has yet to publicly comment on the claims about its Iranian oil imports, and Iran likewise has not issued an immediate response.
Official Chinese data often does not separately identify Iranian crude imports, complicating verification of a 40% decline and the full scale of the shift in trade.
U.S. Treasury Secretary Scott Bessent says China has cut its purchases of Iranian crude oil by roughly 40% in recent months. Yahoo Finance reported Bessent made the claim in interviews with Fox Business Network, linking the drop to U.S. sanctions on Chinese teapot refineries — small, privately owned oil processors — and China drawing down its large strategic petroleum reserve.
The decline, if confirmed, would deal a serious blow to Tehran's finances. Iran depends heavily on oil exports for government revenue. But independent verification of the 40% figure is limited, and China has not publicly responded to Bessent's claim, Yahoo Finance noted.
Bessent credited the drop to a targeted U.S. campaign against China's teapot refineries. These are small, independent oil processors that long served as a back-channel for Iranian crude to enter China. By sanctioning them, Washington made it riskier for buyers to handle Iranian oil, according to Yahoo Finance.
Bessent also pointed to China's strategic petroleum reserve. He suggested China has been drawing down those stockpiles instead of buying Iranian crude. That shift reduces demand for Iranian exports and cuts off a key revenue stream for Tehran, he argued.
U.S. authorities signaled they plan to go further. Officials said they will step up enforcement against shipping companies, financial middlemen, and other networks that help Iran move oil under the radar, Yahoo Finance reported. The goal is to close the gaps that have allowed Iranian crude to keep flowing despite existing sanctions.
Crypto Briefing noted Bessent framed the sanctions campaign as slowly "erasing" Tehran's primary revenue source. Iran's oil exports have long been a lifeline for its government. A sustained 40% drop in Chinese purchases would be one of the sharpest blows to that revenue in years.
China has not commented on Bessent's figures. Iran has also stayed quiet. That silence makes the 40% claim difficult to confirm. Official Chinese trade data typically does not list Iranian crude as a separate category, Yahoo Finance noted. That makes it nearly impossible to cross-check the numbers independently.
The lack of transparency cuts both ways. It means the U.S. cannot easily prove the drop — but China and Iran also cannot easily deny it. For now, Bessent's claim stands as the main public account of a major potential shift in global oil trade.
Bessent also raised a separate and striking concern during his interviews. He said the U.S. has found watermarks from American AI language models embedded in Chinese AI products. "We are finding watermarks of our U.S. large language models on many of the Chinese models, and that's unacceptable," he said, according to Voice of Emirates.
Bessent said the administration would review the issue in the coming days. The comment adds another layer to U.S.-China tensions, which now span oil sanctions, trade policy, and artificial intelligence. No specific action was announced yet.
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