Overview
For decades, the United States has not needed to fire a single shot to keep China economically vulnerable. It has simply needed to be present at sea. The Strait of Malacca, barely 2.8 kilometres wide at its narrowest, is the jugular vein of the Chinese economy. Roughly 80% of China’s oil imports transit this corridor each year, and the US Navy, with docking rights at Singapore’s Changi Naval Base since 2019, serves as a permanent reminder that this lifeline could be severed at will.
That threat is now being answered with steel and concrete. A new overland freight railway linking China to Iran via Russia and Central Asia is more than an infrastructure project. It is a trade corridor immune to naval blockades, untethered from the US dollar, and beyond the reach of American financial sanctions. As Dr Wang Yiwei, Director of the Institute of International Affairs at Renmin University, has argued, “The Belt and Road is not a charity project. It is China rewriting the rules of connectivity, replacing Western maritime dominance with a continental logic that Washington cannot easily counter.”
Part I: The chokepoint that built an empire
The Strait of Malacca funnels over 94,000 vessels annually, carrying roughly one-third of global trade and more than a quarter of the world’s oil supply. For China, this dependence is existential. Chinese strategists call it the “Malacca Dilemma,” a term first attributed to President Hu Jintao in 2003. The arithmetic is blunt: a US naval blockade in a Taiwan conflict scenario would devastate China’s industrial economy within days. RAND Corporation analysts estimated that even a one-week closure could cost China $64mn in direct losses, with manufacturing and energy supply chains compounding that damage rapidly thereafter.
Dr Michael Beckley of Tufts University has written that Washington’s “network of bases, alliances, and chokepoint access gives the United States a structural advantage over China that no amount of Chinese naval buildup can easily replicate in the short term.” China has tried to address this through its “String of Pearls” port relationships across Sri Lanka, Pakistan, and Myanmar, and by investing in the Lombok and Sunda straits as alternative routes. Neither approach solves the problem. The alternative straits add 1,500 kilometers to shipping distances, pass through waters where US allies maintain a strong presence, and lack the infrastructure to handle Malacca-level traffic volumes. Iranian analyst Dr Kayhan Barzegar, Director of the Institute for Middle East Strategic Studies in Tehran, puts it plainly: “American sanctions have taught Iran and China the same lesson at different times. Financial dominance and maritime dominance are two sides of the same coin. The country that controls the sea lanes controls the invoice.”
Part II: The railway that changes the equation
The new freight corridor runs approximately 10,000 kilometres through Russia, Kazakhstan, Turkmenistan, and Iran, reaching Persian Gulf terminals at Bandar Abbas and Imam Khomeini Port. Transit time for freight is 15 days, compared with the 40-day sea voyage from Chinese ports. The implications extend far beyond speed. Consider what this route is not:
• It passes through no maritime chokepoint that Western navies can patrol or close.
• It bypasses the US dollar entirely; Chinese-Iranian trade is increasingly settled in yuan and bilateral barter arrangements designed to circumvent SWIFT.
• It is insulated from diplomatic pressure by the Iran-China 25-year Comprehensive Strategic Partnership, signed in 2021 and valued at a reported $400bn.
A 2023 Carnegie Endowment for International Peace report warned that “the expansion of non-dollar trade corridors between sanctioned economies represents one of the most significant long-term threats to the efficacy of US sanctions policy, potentially rendering the sanctions toolkit obsolete in precisely the contexts where Washington most wishes to use it. Dr Wang Yiwei sharpens the point: China’s strategy is designed not to confront American power directly but to “render it irrelevant by building a parallel system in which American rules simply do not apply.”
Part III: The larger architecture
This railway anchors a planned five-nation expansion integrating Pakistan, Turkey, and Azerbaijan into a single overland network from the Pacific to the Mediterranean. The Asian Development Bank projects the International North-South Transport Corridor (INSTC) to carry up to 30mn tonnes of freight annually, cutting logistics costs by up to 30% compared with current sea routes. In parallel, the Russian-Chinese Arctic corridor could reach 80mn tonnes, offering a genuine alternative to the Suez Canal. Dr Barzegar captures the combined logic: “Each corridor alone is a vulnerability. Together, they are redundant. And redundancy is the enemy of coercion.”
Part IV: What Washington is missing
American strategic commentary has focused heavily on China’s military buildup, its artificial islands, and its growing navy. These are legitimate concerns. But the overland connectivity strategy may prove more consequential because it is harder to counter with the tools that American power is built to use.
You cannot blockade a railway. You cannot sanction a barter arrangement that never touches a dollar-clearing bank. You cannot project carrier-group power into the Kazakh steppe. The China-Iran railway is doing what decades of Chinese naval investment have yet to achieve: making American maritime dominance beside the point for the trade flows that choose to use it.
Dr Beckley urges caution: “These corridors face enormous implementation challenges. Financing gaps, political instability along routes, and the inherent inefficiency of rail versus sea for bulk commodities mean that maritime dominance will remain decisive for decades. But the direction of travel is worth watching.”
That is fair. But the direction of travel is already clear. Steel is being laid. Agreements are being signed. A world in which geography, rather than US naval presence, determines the rules of trade is being assembled, one railway tie at a time.
- The writer is a prominent news anchor, programme presenter and media instructor.