China's foreign ministry said on Monday that Beijing would closely monitor developments and take necessary measures to protect its rights and interests. The statement came ahead of a planned announcement by US Treasury Secretary Scott Bessent on new sanctions against Iran.
The issue is commercially significant because China is the dominant buyer of Iranian crude exports. Reuters has reported, citing Kpler data, that Chinese buyers accounted for more than 80% of Iran's shipped oil in 2025, giving Beijing a substantial economic stake in maintaining access to Iranian supplies.
Washington's approach therefore creates a potential conflict between US sanctions policy and China's energy requirements.
US Treasury Secretary Scott Bessent has described the forthcoming measures as the toughest sanctions imposed on Iran and has urged China to cooperate with Washington.
For Chinese refiners and trading companies, the implications could extend beyond the cost of crude. Sanctions can affect payment channels, shipping arrangements, insurance, vessel access and the ability of companies to repatriate funds. The uncertainty may also encourage buyers and traders to adjust sourcing strategies.
The wider geopolitical consequences could be equally important. Beijing has maintained economic relations with Tehran while seeking to protect its broader commercial relationship with the United States. A significant escalation in sanctions enforcement could therefore complicate China's energy security calculations at a time when shipping through the Strait of Hormuz is already severely disrupted.
The impact will also depend on how Washington defines and enforces penalties against third-country companies. The more aggressively secondary sanctions are applied, the greater the potential for disruption across international commodity and financial markets.
For investors, the central issue is whether sanctions reduce Iranian exports materially or instead redirect trade through alternative channels.
What to watch: the scope of the US sanctions, China's response, Iranian oil flows to Asia, tanker movements, payment arrangements and any evidence of enforcement against Chinese companies.
