Anyone who looks closely at the satellite imagery from mid-March is constantly bothered by a small detail. Instead of using the international shipping lane through Hormuz, a few eastbound bulk carriers hugged the Iranian coastline. All of them had previously made a stop at Imam Khomeini Port. It was intended to close the Strait. Well, it wasn’t. With the exception of a particular group of ships traveling to a particular location, it was closed to nearly everyone. China was that destination most of the time.
Over the last two months, American bombs, Iranian missiles, and a Pentagon consuming munitions at a rate that quietly worries defense planners have dominated the news. It’s all important. The tanker tracking data, however, reveals a deeper story that will likely influence the next ten years more than any single airstrike. Approximately 90% of Iran’s crude is shipped to China. Not the majority. Nearly everything. The way you interpret everything else is altered by that one fact.
For years, Beijing has been quietly constructing this. In exchange for Chinese investment in Iran’s infrastructure and energy, the 25-year cooperation agreement signed in 2021 guaranteed about $400 billion in discounted Iranian oil. The trade passes through what researchers at Kharon and the Atlantic Council kindly refer to as “shadow fleets”—tankers with altered names and flags, ownership concealed in front companies in Hong Kong and the United Arab Emirates, and frequently falsified cargo records. Bypassing SWIFT completely, payments are settled in renminbi via China’s own cross-border system. The war has only highlighted the extent of this intentional parallel financial plumbing.
| Topic Snapshot | Details |
|---|---|
| Subject | China’s dominant role in Gulf oil flows during the 2026 Iran War |
| Iran’s Oil Exports to China | Around 90% of total exports |
| China’s Daily Iranian Crude Imports | Up to 1.4 million barrels/day before war |
| Iran’s Share of China’s Crude Imports | Roughly 13% |
| Strait of Hormuz Daily Transits | Collapsed from 120 to 6.9 (a 94.2% drop) |
| Gulf-Origin Oil for China | About 5.4 million barrels/day through Hormuz |
| Cooperation Agreement | 25-year, $400 billion Iran-China deal signed in 2021 |
| Key Refiners | “Teapot” refineries in Shandong province |
| Payment System | Settled in renminbi via CIPS, bypassing SWIFT |
| Strategic Reserves (China) | 1.3–1.4 billion barrels (about 4 months of imports) |
| Brent Crude Movement | Rose from $78 to over $110 per barrel |
The Chinese buyers aren’t the massive state-owned corporations you might anticipate. These are the so-called “teapot refineries,” which are dispersed throughout Shandong province. They are small and autonomous enough to provide Beijing with “plausible deniability,” as one analyst put it.” However, the picture becomes more complicated when Kharon’s research follows the customer lists and joint ventures. Hebei Xinhai manages alliances with CNPC and CNOOC subsidiaries after receiving Treasury sanctions in May of last year. On paper, independent. Practically integrated into the state. It’s the type of arrangement that functions flawlessly up until someone starts looking, at which point it usually continues to function.
The leverage is what makes this so uncomfortable for Washington. The largest importer of oil in the world is China. Thirty percent of its LNG and about half of its crude typically pass through the Gulf. Beijing was deeply affected when the Strait collapsed from 120 daily transits to less than seven. However, Iranian oil continued to flow to China while nearly all other flows ceased. Later, Iran’s foreign minister listed “friendly countries,” such as China, India, and Russia, as those allowed to pass through a safe corridor. That arrangement isn’t logistical. The map has been subtly redrawn.
Observing this from a distance gives the impression that the United States entered the war believing it was fighting Iran and gradually came to understand that it was fighting a whole ecosystem of sanctions evasion that Beijing had been carefully building. According to reports, the IRGC controls up to half of Iran’s oil export earnings, which are used to finance the missiles and drones targeted at U.S. allies through Chinese teapots and shadow tankers. China’s energy security would be compromised if Iran were cut off, and Washington has been reluctant to initiate that conflict thus far.
It’s difficult to ignore how infrequently this is expressed clearly in American political discourse. The war in Iran has been presented as a tale of military might. The data reveals a different picture of commercial gravity, who purchases what from whom, and the gradual transition of the world’s most significant chokepoint from a globally shared corridor to something more akin to a permission-based system that is essentially controlled by the customer at the other end. It is unclear if that will continue after the ceasefire expires. For now, the tankers continue to travel.
