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refinery “one of Tehran’s most valued customers”. China is Iran’s largest trade partner and by far the biggest buyer of Iranian oil. Chinese buyers received more than 80 percent of Iran
sanctioned](/news/2026/4/25/us-sanctions-chinas-teapot-refinery-for-buying-iranian-oil) an independent Chinese oil refinery for buying hundreds of millions of dollars worth of Iranian oil, along with 40 shipping firms and vessels alleged to be operating as part of Iran’s [shadow
impact and preserve domestic supply, Iranian authorities have imposed temporary restrictions on exports of steel, petrochemicals, polymers and other chemicals. ## Oil exports in the crosshairs The US is using its military capabilities and economic chokeholds
Chinese firms, including refiners accused of buying Iranian oil and companies accused of helping Tehran obtain materials to build drones and missiles. Earlier this month, Beijing issued a “prohibition order” directing firms to disregard