China has strongly challenged the United States over its latest sanctions campaign against Iran, warning that unilateral economic pressure could deepen tensions rather than resolve the wider dispute. The confrontation comes as Washington intensifies efforts to cut Tehran’s access to international trade and financial networks while placing growing pressure on countries that continue doing business with Iran.
The latest US measures, announced by Treasury Secretary Scott Bessent, target dozens of individuals, companies and vessels linked to Iran. Washington has also warned that countries and businesses continuing significant economic relations with Tehran could face secondary sanctions, potentially restricting their access to the US financial system. The strategy is intended to weaken Iran’s remaining sources of revenue and increase pressure on its government.
Beijing has rejected the approach. Chinese Foreign Ministry spokesman Lin Jian said China opposes what it describes as unilateral sanctions that lack a basis in international law and are not authorised by the United Nations Security Council. He said Beijing would take necessary measures to protect its legitimate rights and interests.
The dispute is particularly significant because China remains a major destination for Iranian oil and an important economic partner for Tehran. US pressure on Iran therefore inevitably creates a difficult choice for Beijing: comply with Washington’s demands and potentially disrupt an established energy relationship, or maintain trade with Iran while risking further American sanctions. Reuters has reported that Chinese state-owned refiners have largely avoided direct purchases of Iranian crude since Washington restored sanctions in 2019, while independent refiners and complex trading networks have continued to play a role in the flow of Iranian oil to China.
For Washington, the calculation is broader than Iran’s oil exports. The Trump administration wants to demonstrate that sanctions can reach beyond Iran itself and make it increasingly difficult for Tehran to generate revenue through foreign partners. Yet targeting major economies such as China carries its own risks, particularly at a time when Washington and Beijing are attempting to manage wider trade and diplomatic tensions.
The economic consequences could also extend beyond the United States, China and Iran. Iran is an important participant in global energy markets, and any serious disruption to its oil exports or regional shipping routes could affect crude prices, transportation costs and inflation in other countries. Recent market movements, however, suggest investors have so far viewed the latest measures as less disruptive than some of the most severe scenarios previously feared.
Iran has meanwhile responded defiantly, promising to resist the expanded sanctions while signalling that it remains interested in diplomatic channels. The contrasting positions leave the latest US measures as both an economic and diplomatic test.
The central question now is whether Washington can persuade Iran’s major trading partners to reduce their economic ties without triggering a wider confrontation with countries such as China. Beijing’s warning suggests that pressure on Tehran could increasingly become another point of friction between the world’s two largest economies.