China Just Ordered Its Companies to Ignore US Sanctions. The Banks Are Next.
What happened
On May 2, China's Ministry of Commerce issued a prohibition order under its blocking regulations directing companies not to recognize or comply with US Treasury sanctions on five Chinese oil refining companies, including Hengli Petrochemical and four smaller teapot refiners. The order declared the US sanctions a violation of international law. This is the first time Beijing has activated its blocking law, which has existed since 2021 but had never been formally invoked. The five companies were sanctioned by OFAC in April for allegedly purchasing billions of dollars in Iranian crude. The move comes 12 days before President Trump is scheduled to visit Beijing for a summit with Xi Jinping on May 14-15. US officials have publicly declined to comment on the order. Meanwhile, China introduced two State Council decrees in spring 2026 establishing formal frameworks to counter foreign extraterritorial measures and protect Chinese supply chains.
China's first use of its blocking law is not about five oil refiners; it is about establishing before the summit that Beijing will not absorb US sanctions compliance as a political cost, and that the summit price for a trade deal is lifting the sanctions framework, not extending it.
The Hidden Bet
China's blocking order helps the sanctioned refiners
Chinese banks that service the five companies still face US secondary sanctions if they process transactions. Beijing can order non-compliance with US law; it cannot eliminate the consequence of losing dollar-clearing access. The practical effect may be that the refiners' banking relationships become more difficult, not less.
Trump's silence before the summit means he will not respond to the blocking order
Trump has a pattern of deferring escalation before meetings and then announcing punitive measures immediately after. The silence may be packaging the response as a post-summit announcement rather than suppressing it.
The blocking order is about the Iran sanctions specifically
The legal framework China has built targets any 'unjustifiable extraterritorial application of foreign legislation.' The Iran sanctions are the first use case, but the mechanism is general. Beijing has built infrastructure to systematically counter US sanctions and export controls, not just to defend five refiners.
The Real Disagreement
The genuine fork is whether the US sanctions system can survive the erosion of compliance by a major economy. The US dollar's role as the global reserve currency gives Treasury secondary sanctions their enforcement power: any bank that wants dollar access has to comply or lose it. China's move tests whether a state large enough to sustain alternative payment infrastructure can actually defect from that system at scale. The market's implicit answer, in the continued dominance of dollar-denominated trade, is no. But Beijing's bet is that the network of Chinese banks, the Belt and Road payment corridors, and accumulated yuan trade volume have reached a threshold where defection is survivable. I lean toward the US position being durable for now, but the margin of safety is narrower than it was five years ago, and each successful instance of Chinese sanctions defiance narrows it further.
What No One Is Saying
The US government's silence is itself a signal to every other country watching: if you have enough leverage before a bilateral summit, you can violate US sanctions and face no immediate consequence. Saudi Arabia, the UAE, Turkey, and India are all watching to see if China pays a price.
Who Pays
Chinese banks servicing the five sanctioned refiners
Immediate; the conflict is live as of May 2
They now face a formal conflict between Beijing's order and US secondary sanctions. Any bank that processes transactions for the five companies risks losing correspondent banking relationships and US dollar access. The ones that comply with Beijing lose access to New York; the ones that comply with Washington face potential domestic penalties.
US companies with supply chains running through China
Enforcement of the decrees is uncertain but the legal exposure begins now
The State Council decrees on supply chain security include provisions penalizing foreign companies that shift production away from China. US firms restructuring supply chains in response to tariffs now face a legal counterweight in Chinese domestic law.
Iran
Ongoing; the blocking order is in effect immediately
China's open defiance of the sanctions undermines the economic pressure that is supposed to constrain Iran's military program. If Beijing's blocking order holds, Iran retains a major buyer for crude that the US was trying to cut off.
Scenarios
Summit deal absorbs the dispute
Trump and Xi reach a broad trade framework that includes quiet US agreement not to enforce secondary sanctions against Chinese banks dealing with the five refiners in exchange for Chinese concessions on chip exports, fentanyl, or Taiwan-adjacent military activity. The blocking order becomes irrelevant.
Signal Any summit communique that references 'sanctions relief' or 'humanitarian carveouts' in the context of trade, or a Treasury announcement of de-listing or modified enforcement after May 15.
US designates Chinese banks
Treasury adds one or more Chinese banks to the SDN list for processing transactions with the sanctioned refiners. Beijing responds by restricting US financial institutions' Chinese market access. Bilateral financial system fragmentation accelerates.
Signal An OFAC designation of a Chinese state bank or a Treasury announcement of enhanced China-Iran transaction monitoring.
Blocking order holds, no US response
The summit produces no resolution of the sanctions conflict. US secondary sanctions remain technically in force but are not enforced against Chinese actors. The blocking order establishes a durable precedent that Chinese companies can ignore US sanctions with Beijing's political cover.
Signal No Treasury action against Chinese banks within 90 days of the blocking order, combined with no summit language on the sanctions issue.
What Would Change This
If Treasury designates a major Chinese bank for sanctions violations before May 14, the summit framework collapses and the bottom line changes: the confrontation becomes overt rather than managed, and the question shifts from deal-making to escalation management.