China has stopped treating U.S. sanctions on Iranian oil as a problem to route around and started treating them as a legal front to contest. Beijing’s Commerce Ministry said plainly, “We do not recognize, implement, or comply with US sanctions.” It backed the statement with its Blocking Rules, the first time it has used that framework to tell Chinese citizens and companies not to recognize or obey unilateral American sanctions.
The immediate shield covers five Chinese refineries hit by Washington, including Hengli Petrochemical. Beijing’s language was just as blunt. It called the sanctions a “violation of international law” and labeled them “illegal extraterritoriality.” This is a different move from the usual diplomatic noise; it is an answer in law, commerce, and state power, not just in rhetoric.
Beijing is choosing fuel over deference
The oil numbers explain why this fight was never going to stay abstract. In 2025, China bought more than 80 percent of Iran’s oil exports, roughly 1.4 million barrels per day. Iran gets a badly needed revenue stream under sanctions. China gets discounted crude and a supply line it can count on.
This is the core of Beijing’s position. Energy security is being treated as a hard national interest, not a bargaining chip for Washington to squeeze. If the choice is between cleaner compliance and keeping refineries supplied, Beijing has already answered. It is taking the oil.
The political implication is harsher than the trade headline suggests. Washington has long relied on the assumption that sanctions become self-executing once they are routed through the dollar system. China is now saying the opposite. It is drawing a line between access to its market and obedience to U.S. policy, doing so with the backing of domestic law.
The blocking rules are the real break
China’s Blocking Rules were put on the books by the Ministry of Commerce on January 9, 2021, under the formal title Measures for Counteracting Unjustified Extraterritorial Application of Foreign Laws and Measures. The idea is simple enough to understand: when Beijing decides a foreign law reaches too far, Chinese firms and citizens are told not to treat it as binding.
The framework does three things. It orders Chinese entities not to comply with foreign measures Beijing deems unjustified. It requires reporting of foreign laws that may hurt legitimate Chinese interests. And it gives companies and individuals a path to seek remedies in Chinese courts if they are damaged by compliance with those foreign sanctions.
This goes beyond a symbolic protest. It creates a domestic counter-system meant to blunt the reach of U.S. penalties inside China’s own economic space. In practice, Chinese firms can point to Beijing and say they are not freelancing when they resist Washington. They are following state instruction.
There are precedents, but none on this scale. The European Union built its own blocking statute in the 1990s and refreshed it in 2018 to resist U.S. sanctions on Cuba and Iran. In theory, it forbids compliance and allows lawsuits for damages. In practice, many European firms still flinch when the U.S. market is on the other side of the equation. Russia took a different route after 2014, pushing more trade in local currencies and trying to weaken dollar dependence without building a formal legal wall. Cuba has resisted U.S. sanctions for decades, but its isolation never threatened the wider system. China is different because it is not small, and it is not improvising.
The dollar is being challenged where it is strongest
The dollar’s advantage is not a slogan. It is the machinery that lets Washington turn financial access into geopolitical pressure. The U.S. currency still accounts for more than 60 percent of global foreign exchange reserves and about 88 percent of foreign exchange transactions. American sanctions have unusual reach because so much cross-border trade still touches dollar-denominated institutions.
China’s move presses directly on that weak point. If the world’s second-largest economy can tell its firms to ignore U.S. sanctions, protect them with domestic law, and keep buying sanctioned oil anyway, then U.S. financial authority starts to look conditional rather than universal. Not gone, but conditional.
Moisés R. Hernández, director of MRH Análisis and World Academic Podcast, framed it in even starker terms. He described the move as “a declaration of commercial and legal war against the empire,” and argued that Washington’s arrogance has a limit, while the multipolar world is now reality and the empire is losing control.
That language is dramatic, but the underlying point is hard to dismiss. Beijing is building a legal and commercial shelter around its own interests, doing so in open defiance of Washington’s preferred rules. The message to the U.S. is not subtle: sanctions still work on weaker targets, but they are no longer a universal command.
