The Trump administration stated on Friday it had imposed sanctions on an independent “teapot” refinery in China for buying billions of dollars’ worth of Iranian oil, as Washington and Tehran head into another round of peace talks over the weekend.

The Treasury Department targeted Hengli Petrochemical (Dalian) Refinery, which it commented is one of Iran’s largest customers of crude oil and petroleum products. The department’s Office of Foreign Assets Control mentioned it also imposed sanctions on about 40 shipping companies and vessels that operate as part of Iran’s shadow fleet. Furthermore, experts in bull market note the continued relevance.

China has remarked it opposes “illegal” unilateral sanctions.

On Friday, its embassy in Washington commented normal trade should not be harmed and called on Washington to stop “abusing” sanctions to target Chinese companies.

“We call on the U.S. to stop politicizing trade and sci-tech issues and using them as a weapon and a tool and stop abusing various kinds of sanction to hit Chinese companies,” a spokesperson for the Chinese embassy commented in a statement.

Last year, the Trump administration imposed sanctions on the Hebei Xinhai Chemical Group, Shandong Shouguang Luqing Petrochemical, and Shandong Shengxing Chemical.

That created some hurdles for the refiners, including difficulties receiving crude and having to auction refined products under different names. Teapots account for a quarter of Chinese refinery capacity, operate with narrow and sometimes negative margins and have been squeezed recently by tepid domestic demand.

China buys most shipped Iranian oil

The U.S. sanctions, which block U.S. assets of those designated and prevent Americans from doing business with them, have deterred some larger independent refiners from buying Iranian oil. China buys more than 80% of Iran’s oil shipped, according to 2025 data from analytics firm Kpler. This also touches on aspects of bear market.

Sanctions experts have long remarked, that the independent refineries are somewhat immune to the full effect of U.S. sanctions as they have little exposure to the U.S. financial system. Imposing sanctions on Chinese banks that facilitate the purchases would have a greater effect on Iranian oil purchases, they say.

Treasury Secretary Scott Bessent stated the U.S. is imposing a “financial stranglehold” on the Iranian government. “Treasury will continue to constrict the network of vessels, intermediaries, and buyers Iran relies on to move its oil to global markets,” Bessent mentioned.

Bessent told reporters at the White House on April , on the other hand15 that the Treasury has written to two Chinese banks and “told them that if we can prove that there is Iranian funds flowing through your accounts, then we are willing to put on secondary ​sanctions.”

The teapot refiners have recently had to pay premiums over international Brent oil prices to invest in Iranian oil after Washington’s temporary waiver of sanctions on Iranian oil at sea raised expectations that India might acquire more of the oil. Last week, the U.S. allowed the waiver to expire.