Iran continues to export crude oil to China through a clandestine network of aging tankers and independent refineries to evade U.S. sanctions.
This covert trade allows Tehran to maintain a critical financial lifeline while China secures energy supplies and challenges American diplomatic pressure. The persistence of these networks demonstrates the difficulty of enforcing international sanctions on global energy markets.
The operation relies on "shadow fleets," which consist of older tankers that operate outside traditional regulatory oversight [1, 2]. These vessels transport crude from Iranian ports across the Persian Gulf to the Chinese coast [3, 5]. Once the oil arrives, it is processed by "teapot refineries," small, independent facilities that lack the formal corporate structures of state-owned enterprises [1, 2].
This shadowy ecosystem pumps billions of dollars [1, 2, 3] into the Iranian economy. By routing oil through these independent operators, China is able to sustain the flow of energy despite ongoing U.S. sanctions aimed at isolating the Iranian regime [2, 4].
Recent reports indicate that these activities remain active as of May 2026 [2, 3]. Some of the Chinese facilities processing this oil are located a few hundred miles [3] from the site where Chinese leader Xi Jinping is scheduled to receive U.S. President Donald Trump [3, 5].
The network has been active throughout 2024 and 2025, evolving to avoid detection [2, 3]. By utilizing these decentralized refineries and unregistered ships, both nations have created a parallel trade system that operates beneath the surface of official diplomatic relations [1, 4].
“This shadowy ecosystem pumps billions of dollars into Iran’s economy.”
The continued use of shadow fleets and teapot refineries suggests that U.S. economic sanctions are failing to decouple the Iranian and Chinese economies. By leveraging independent refineries and unregulated shipping, China has created a resilient loophole that provides Iran with essential revenue, potentially reducing Tehran's incentive to negotiate on nuclear or regional security issues.
