China Deploys Blocking Statute Against U.S. Sanctions, Forcing Corporate Compliance Choice
Beijing's first formal use of counter-sanctions law creates binding legal conflict for firms caught between Washington and Chinese market access.
China’s Ministry of Commerce issued a prohibition order on 2 May blocking U.S. sanctions against five Chinese refineries, marking the first operational deployment of Beijing’s 2021 blocking statute and establishing a direct legal trap for international businesses operating across both jurisdictions.
The move targets U.S. Treasury designations against Hengli Petrochemical (Dalian)—China’s second-largest independent refinery—and four smaller processors sanctioned in April for purchasing Iranian crude. By invoking Article 4 of its Blocking Rules, Beijing prohibits Chinese entities and individuals from complying with the U.S. Sanctions, creating enforceable obligations that contradict American law. Companies now face penalties in whichever jurisdiction they disobey.
China’s Blocking Rules, enacted 9 January 2021, empower the Ministry of Commerce to nullify foreign sanctions deemed to violate international law or damage Chinese sovereignty. The statute permits Chinese entities to claim compensation from those enforcing blocked sanctions and criminalises cooperation with foreign measures. Until 2 May 2026, the law remained unused—a theoretical deterrent without operational precedent.
Why This Escalation Now
The immediate trigger was OFAC’s 24 April designation of Hengli Petrochemical, which according to Al Jazeera the U.S. Treasury accused of generating hundreds of millions of dollars for Iran’s military through crude purchases. China bought more than 80% of Iranian oil shipped in 2025, according to Kpler data, cementing its role as Tehran’s primary sanctions relief valve.
U.S. enforcement escalated sharply in 2025. The Uyghur Forced Labor Prevention Act saw 67 designations compared to three in 2024, while the Anti-Foreign Sanctions Law produced over 100 entity listings, per Jones Day analysis. Since March 2025, five Chinese “teapot” refineries have been sanctioned for Iranian crude processing. Beijing’s response shifts from case-by-case diplomatic protest to systematic legal nullification.
“By formalising this resistance into statute law, China is sending a clear signal: it views US sanctions as a systemic, long-term challenge that requires a structural legal response, rather than just reacting case-by-case.”
— Naimeh Masumy, PhD candidate at Maastricht University
The Corporate Compliance Trap
OFAC issued General License V authorising wind-down transactions with Hengli through 24 May—one week ago. That deadline has passed. Chinese entities are now legally required by Beijing to ignore U.S. sanctions while Washington threatens secondary sanctions on anyone facilitating Iranian oil flows. According to OilPrice.com, China’s blocking statute permits sanctioned entities to claim compensation from those who comply with U.S. measures, creating financial liability in either direction.
For multinational banks, insurers, and shipping firms, the calculation shifts. “For these entities, complying with the blocking statute becomes a more realistic expectation – and the risk of US punishment becomes the cost of doing business within China’s regulatory framework,” Dominic Chiu of Eurasia Group told Al Jazeera. Companies deeply embedded in Chinese supply chains may find U.S. market exclusion preferable to losing access to the world’s second-largest economy.
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Strategic Implications Beyond Oil
The timing is deliberate. According to Brownstein Hyatt Farber Schreck, the blocking order arrived ahead of a Trump-Xi summit scheduled for later this month, positioning Beijing’s energy security as non-negotiable. Secretary of State Marco Rubio has signalled enforcement will intensify, warning that “any person or vessel facilitating these flows – through covert trade and finance – risks exposure to US sanctions.”
The precedent extends beyond Iranian oil. Russia, facing its own sanctions regime, now has a template for legal nullification. Iran could formalise similar blocking measures. The effectiveness of Western sanctions depends on universal compliance enforced through dollar system access. China’s move demonstrates that sufficiently large economies can create parallel legal frameworks that make compliance optional for entities willing to accept U.S. market exclusion.
“They want to have as many levers as possible. This should be seen in the context of increasing controls. It is not a one off,” Ja Ian Chong of the National University of Singapore told Fortune. Beijing’s expanding toolkit—the Unreliable Entity List, export controls on critical minerals, Anti-Foreign Sanctions Law—now includes operational blocking measures with real penalties.
What to Watch
The Trump-Xi summit will reveal whether this becomes permanent rupture or negotiating leverage. If Washington backs down, expect similar blocking orders across technology and finance sectors. If the U.S. escalates with secondary sanctions, watch which banks and shipping firms choose market access over dollar system participation—that split will define the architecture of decoupling.
Oil pricing volatility depends on enforcement intensity. If Chinese refineries continue processing Iranian crude under legal protection, Brent premium over Dubai narrows as sanctioned supply finds stable outlets. If tanker insurers and port operators face credible U.S. sanctions, physical bottlenecks could spike spot prices despite ample crude availability.
Most critically, monitor Russia’s legal response. Moscow has avoided formalising counter-sanctions into blocking statutes, relying instead on opaque workarounds. If China’s approach proves viable—protecting entities from Western enforcement while maintaining trade flows—expect legislative mimicry across the BRICS bloc. The era of sanctions as costless geopolitical tools ends when major economies provide legal cover for non-compliance.