Nearly 50 days into the Iran war, which began on February 28, neither of Washington's two core objectives — permanently ending Iran's nuclear ambitions and securing free passage through the Strait of Hormuz — has been achieved. The strait remains effectively closed due to Iranian harassment, delivering a severe shock to the global economy.
Against that backdrop, with the Trump administration appearing trapped and unable to extricate itself from the conflict, Beijing has made a move that surprised most observers. China, widely expected to watch from the sidelines and do nothing, made a rare diplomatic intervention alongside Pakistan to persuade Tehran to enter negotiations with Washington.
President Donald Trump publicly credited the effort, stating that "China helped Iran take this critical step." White House officials confirmed that the two governments held consultations at the "highest levels" on a ceasefire framework.
Beijing's intervention reflects several converging motivations: addressing the threat a prolonged Hormuz closure poses to its high-tech supply chains; recasting its international image — particularly in Western eyes — as an indispensable mediator; and easing bilateral tensions ahead of Trump's state visit to Beijing on May 14–15, while strengthening its hand at the summit. Underlying these tactical moves is a longer-term strategic ambition: to construct and consolidate an international framework constraining Taiwan independence, reversing the diplomatic setbacks Beijing sustained on that front under Biden.
Why the Strait of Hormuz Closure Threatens China's Tech Ambitions
At first glance, China's energy position appeared resilient. As of early 2026, Beijing held reserves of approximately 1.4 billion barrels (roughly 190 million metric tons) of oil — enough to sustain consumption for six to seven months without any imports. Even after the war began, China continued receiving roughly 1.8 million barrels per day from Iran. Reports indicate that Iran had approximately 160 million barrels of pre-loaded oil outside the Persian Gulf, sufficient to supply customers until mid-July, with the majority destined for Chinese buyers.
The more acute vulnerability, however, lies not in oil but in helium.
Helium is a critical input for semiconductors, industrial manufacturing, and medical imaging. Asian nations, China included, rely heavily on Middle Eastern helium imports — particularly Grade 6N (six-nines purity) helium required for semiconductor fabrication. China has become the world's second-largest helium consumer, with demand spanning quantum computing, chip production, and laser systems.
China's estimated annual helium demand stands at approximately 12 million cubic meters, nearly all imported. Close to 90% comes from Qatar, while imports from the United States account for less than 5%. Since the war began, Qatar's helium output has fallen by approximately 14%, causing international prices to roughly double. The problem is compounded by helium's physical properties: it evaporates during storage and must reach end users within 45 days, making strategic stockpiling structurally impossible. Qatar's accumulated helium stockpiles are currently stranded by the Hormuz closure and risk being lost entirely.
If the conflict continues — particularly given that the United States began a formal blockade of the Strait of Hormuz on April 13 — China could face a serious helium shortage in the near term. The only realistic alternative supplier is the United States, which controls more than 40% of global helium reserves. Depending on Washington for helium supply, however, would deepen China's technological dependence on its primary strategic competitor — particularly in artificial intelligence. From a long-term supply chain resilience perspective, a swift restoration of Hormuz shipping serves Beijing's interests.
Raising Beijing's Negotiating Position Ahead of the Trump–Xi Summit
China's intervention also carries broader diplomatic calculus. During the Biden administration, Washington successfully consolidated a broad coalition — including NATO members and Indo-Pacific partners — that constrained China's international influence. European allies were particularly aggrieved by Beijing's reported assistance to Russia in circumventing sanctions during the Ukraine war. That coalition also limited China's ability to advance one of its central cross-strait objectives: constructing an international framework that delegitimizes Taiwan's pursuit of formal independence.
Now, with NATO members and Asian allies preoccupied by the Trump administration's use of military force against Iran, a successful Chinese mediation would allow Beijing to recast itself as a stabilizing power. Policy experts note this framing could help erode the multilateral containment architecture Beijing faced under Biden.
More immediately, China's active mediation serves as a concrete signal to Washington: Beijing has no intention of exploiting U.S. military entanglement in the Middle East to challenge American interests in the Western Pacific. That reassurance, delivered through action rather than rhetoric, would carry significant weight in the weeks before the Trump–Xi summit.
The longer U.S. forces remain committed to the Persian Gulf, the more Washington may need Beijing's continued cooperation to achieve a face-saving and timely exit from the Iran conflict. This structural dependency weakens Washington's leverage in trade negotiations and significantly strengthens China's hand at the upcoming summit — reducing, in practical terms, the Trump administration's ability to impose further high tariffs on Chinese goods without diplomatic cost.
The Taiwan Dimension: Reinforcing an Anti-Independence Framework
Of all Beijing's calculations, none carries greater consequence for Taiwan than its effort to leverage the current diplomatic moment to reshape the international framing on Taiwan independence.
Through its Iran mediation and its high-profile hosting of a Kuomintang (KMT) delegation — including a meeting between the two parties' leaderships — Beijing is positioning itself to press Trump for a public statement favorable to its cross-strait position. Formulations such as "the United States supports China's peaceful reunification" or "the United States opposes Taiwan independence" would provide Beijing with a powerful anchor for constructing a broader international anti-independence framework.
Such a statement would also serve domestic political purposes for Xi Jinping. Securing a major American endorsement on Taiwan ahead of the Chinese Communist Party's 21st National Congress in 2027 would bolster the legitimacy of Xi's continued rule.
This effort is not new. After Trump's first bilateral call with Xi following his return to the White House, Xinhua's readout placed Taiwan prominently in the second paragraph — immediately after Xi's remarks on the tariff dispute — with Xi stating that "the United States should handle the Taiwan question carefully and avoid letting a tiny minority of 'Taiwan independence' separatists drag China and the United States into confrontation."
The strategic logic proceeds in stages: China's mediation dispels Trump's concern about Beijing exploiting U.S. Middle East exposure; the KMT meetings allow Washington to characterize "anti-independence" sentiment as a genuine force within Taiwan's domestic politics; and Trump's domestic political pressures — his approval ratings have declined as the Iran conflict drags on — create additional incentive to return from Beijing with visible deliverables ahead of the November midterm elections.
If Trump makes such a statement, Beijing would cite it as precedent in pressing other Western nations, as well as Japan and South Korea, for similar declarations — potentially reversing, in a single diplomatic sequence, the setbacks China suffered in international Taiwan-related diplomacy during the Biden years.
Arms Sales to Taiwan: A Possible Casualty
Taiwan's defense community has additional reason for concern. Washington informally notified senior members of Congress as early as January of this year about a new arms sales package for Taiwan. The package reportedly includes Patriot III air defense missile systems, National Advanced Surface-to-Air Missile Systems (NASAMS), and Link-22 data-link technology.
Given Trump's need for Beijing's economic "deliverables" to materialize on schedule, Washington may continue to delay the formal announcement of this package even after the summit concludes — subordinating Taiwan's defense procurement timeline to the transactional demands of U.S.-China summit diplomacy.
*The author is a research fellow at the Chinese Council of Advanced Policy Studies and a research fellow at theCentre for Advanced Technology(CAT) at Tamkang University.
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