US continues to escalate financial war on Iran: China's oil and shadow settlement network is becoming a breakthrough for sanctions

U.S. actions against Iran are shifting further from traditional sanctions to a systematic blockade of energy revenues, financial settlements, shipping and third-country trading networks, and China is taking an increasingly inevitable position in this round of pressures.

Luther’s recent follow-up of U.S. Treasury Secretary Scott Bessent and the U.S. government’s economic action against Iran described it as an unprecedented financial offensive.Luther’s August 23 report said the next phase of the U.S. will focus not only on continuing sanctions on Iran itself, but may also direct pressure on countries and that continue to maintain trade with Iran.

Part of the extended analysis in this judgment is still to wait for the U.S. government to announce further specific policies, but the Treasury Department’s public actions show that one direction is very clear: cutting off Iran’s international network of oil revenues, and China is the key node among them.

The U.S. Treasury Department has previously imposed direct sanctions on independent refineries that import Iranian oil into China. The Treasury Department has made it clear that relevant Chinese refineries have purchased hundreds of millions of dollars worth of Iranian crude oil, which provides an important economic source for the Iranian government.

Original U.S. Government Document: U.S. Treasury Sanctions on Chinese Iranian Oil Importers

This means that the U.S. is changing the way in the past to just track Iran’s exports and start pursuing the entire chain of transactions: who buys oil, who is responsible for transportation, who supplies ships, who helps settlement, who helps hide the flow of money, all could be the subject of sanctions.

Why China becomes a key

Iran is able to withstand U.S. sanctions for a long time, one of the important reasons being that oil is still able to enter the international market through a complex trade and shipping system.China's independent refiners, traders and shipping chains related to China have become the subject of continuous tracking of the U.S. financial sector in recent years.

The U.S. Treasury’s multi-rounds of action in 2026 has further targeted Iran’s shadow banks and overseas financial networks.The Treasury said its “Economic Fury” operation was targeting Iran’s ability to generate, transfer and return funds, and said related actions have blocked potential revenue at billions of dollars, while freezing crypto assets related to the Iranian regime and continuing to fight the shadow banking network.

Besent said in May that U.S. economic pressures had already targeted Iran’s weapons programs, agency systems, and sources of revenue on which nuclear activities depend, and that the Treasury Department had destroyed billions of dollars in related revenue channels.

Therefore, the real concern is not “whether the U.S. will still sanction Iran,” but whether the U.S. is prepared to put third-country companies and financial institutions who continue to conduct large-scale energy transactions with Iran at risk of more stringent secondary sanctions.

If this policy continues, China will find it difficult to stay out.

From Iranian oil to Chinese companies, the chain of sanctions is closing

In the past, Chinese authorities could turn the purchase of Iranian oil packaging into normal trade relations, or reduce the visibility of the central government’s direct involvement through independent refineries, trading companies and complex shipping arrangements.

The Treasury is no longer concerned with how politically interpret their identity, but how money and commodities flow.

Where a tanker loads, whether it shuts off or manipulates an automatic identification system, how the goods are shipped by ship to ship, which refinery will eventually receive the goods, which company, bank or other financial channel the money is paid through – these transaction links once connected could form a complete chain of sanction evidence.

U.S. Treasury’s previous actions targeting Iran’s shadow banking network have also clearly focused on helping Iran convert and transfer oil revenues into foreign financial structures that can be used in foreign currencies.

This is also where the current situation really deserves to be watched by Chinese companies: sanctions are tracking from list-based punishments to supply chains, shipping chains and capital chains.

Focus on China: Beijing is facing not just Iran

From a Chinese perspective, the importance of U.S. financial and energy blockades on Iran is far greater than the Middle East itself.

China has long used its vast manufacturing capacity, energy import capacity, state-owned and private-owned hybrid systems and cross-border financial channels to maintain economic connections with countries subject to Western sanctions.An important basis for this model is the belief that the United States will not bear the cost of a wider economic conflict with China in order to sanction third countries.

This assumption is now being challenged.

If Washington eventually extends its financial pressure on Iran further to buy, settle and transport, Beijing will face an increasingly realistic choice: continuing to provide Iran with important energy markets will have to take the risk of Chinese companies entering the U.S. financial sanctions system; demanding companies to reduce Iran’s energy gap means China’s so-called “strategic partnership” must re-calculate costs in the face of real economic pressure.

What’s more to be tracked is whether the U.S. will replicate this pattern to other countries that are sanctioned and also highly dependent on Chinese markets and financial networks.

The escalating financial war, therefore, is not just a dispute between the United States and Iran; it is also a test of pressure on the Chinese government to use the global trade, shipping and financial systems to support the sanctioned regime.

For Beijing, the danger is not a new list of sanctions, but the U.S. is trying to build a new logic of retaliation: not only to sanction the hostile regime itself, but also to track overseas companies, ships, financial institutions and trading networks that maintain the regime’s capital line.

Once this logic is fully implemented, the space for the decentralization of risks in the past, depending on third-party companies, transfer trade, shadow fleet and complex settlement structures, will be further compressed.

What really needs to be observed next is whether there will be more Chinese refiners, traders, shipping companies and financial intermediaries on the next round of the U.S. Treasury list, which will determine whether the so-called “financial offensive” against Iran will stop on the Iranian issue or have begun to evolve into a wider censorship of China’s global economic network.