The United States has expanded its maritime blockade on Iranian-linked vessels, intercepting ships bound for China and pressuring Beijing's energy supplies. U.S. forces boarded the sanctioned tanker M/T Tifani in the Indo-Pacific on April 21, while another vessel, the Rich Starry, turned back from the Strait of Hormuz. Experts say China is managing short-term impacts through reserves but faces diplomatic challenges.
The U.S. blockade targets Iran's 'dark fleet' of tankers that obscure ownership and falsify data to export oil despite sanctions, much of it to China. Last week, the effort expanded worldwide, with enforcement reaching the Indo-Pacific for the first time. Overnight on April 21, U.S. forces conducted a right-of-visit and boarding of the stateless M/T Tifani without incident, as announced by the Department of War on social media. Separately, the sanctioned Rich Starry, carrying 250,000 barrels of methanol from the United Arab Emirates and headed to China, transited the Strait of Hormuz before retreating toward Iranian waters upon encountering the blockade. Beijing reportedly urged Tehran on shipping and de-escalation, according to Craig Singleton, a senior fellow at the Foundation for Defense of Democracies. Singleton noted China's limited immediate energy disruptions thanks to strategic reserves of about 1.39 billion barrels, covering 120 days of imports, per Kayrros data. Roughly 45% to 50% of China's crude passes through the Strait of Hormuz, with over half its 2025 crude oil and a third of LNG from the Middle East, including 12% estimated from Iran via illicit means, despite official denials. Elizabeth Economy of the Hoover Institution said Beijing prioritizes mitigating downsides like economic recession risks and maintaining Middle East ties. Following Operation Epic Fury strikes by the U.S. and Israel, Iran attacked Arab neighbors with rockets and drones, complicating China's relations. An April 8 ceasefire followed rumored Chinese pressure on Iran for talks in Pakistan, though experts like Michael Sobolik of the Hudson Institute doubt Beijing's leverage over Tehran's nuclear ambitions. The tensions precede a May 14-15 summit between Presidents Trump and Xi Jinping, focused mainly on trade, with no major derailment yet.
