China's Washington embassy issued a statement on Saturday 25 April opposing the OFAC designation of Hengli Petrochemical as "illegal unilateral sanctions". The response stayed at the embassy floor; no MOFCOM elevation followed. MOFCOM is China's Ministry of Commerce, the cabinet-level body that issues China's retaliatory trade and sanctions instruments; an embassy statement is the lowest-rank state response in the Chinese diplomatic ladder.
Hengli is China's second-largest independent refinery. The OFAC action on Friday 24 April designated Hengli plus 39 entities under the sb0472 statutory authority and was the first US designation to cite Iranian-nuclear-programme financing as the legal basis . A response that stops at embassy level on a sanctions action against a domestic industrial player of Hengli's size signals Beijing's unwillingness to risk a trade escalation cycle with Washington in the current quarter.
The operational consequence is that Chinese-owned dark-fleet tonnage continues to dominate the surviving Hormuz traffic without a state-level escalation challenge to the legal predicate. OFAC has not yet published a GL-V wind-down deadline or authorised counterparty scope for Hengli's customers; that text, when it arrives, will set the price refiners and traders must pay to exit Hengli-related supply chains. Until MOFCOM elevates, Beijing's position on the nuclear-financing framing remains a verbal-only objection from the lowest rung of its diplomatic apparatus.
