World's largest oil importer · 40–50% Hormuz transit · absolute volumes make any disruption a national security emergency
China imports over 10 million barrels per day (72% of its consumption). Approximately 40–50% of those crude volumes pass through the Strait of Hormuz — a lower percentage than Japan or India, but in absolute terms, China is the world's largest Gulf crude buyer (~5 million bpd via Hormuz). A closure would remove 5 million bpd from the global market, causing a worldwide price shock and severe domestic disruption.
Russia has become China's top supplier via pipelines (ESPO, Power of Siberia) and tanker routes that bypass Hormuz. However, Saudi Arabia, Iraq, and Iran remain critical — together supplying over 30% of imports, all transiting Hormuz.
China's strategic petroleum reserve (SPR) is estimated at 80–90 days of net imports, though exact figures are state-secret. The government has built massive underground storage facilities across several provinces, with capacity exceeding 500 million barrels. Additionally, state-owned enterprises hold commercial stocks. Beijing would immediately deploy reserves and order state refiners to prioritize domestic supply.
Current situation: The US-Iran war has disrupted Gulf oil shipments. For China, the primary impact is a global oil price spike and the loss of ~4–5 million bpd of Hormuz-sourced crude. Thanks to the Russia-Ukraine war, China has diversified toward Russian pipeline oil (200 million tons annually) and seaborne Russian crude, providing a significant buffer. However, losing Saudi and Iraqi volumes would still cut China's supply by nearly 30%.
If Iran successfully blocks the strait for >60 days, China would rely on Russian pipeline oil (capacity ~1.6 million bpd), SPR releases, and increased imports from West Africa, Brazil, and the US (via Cape route). However, even under optimistic assumptions, China would face a daily deficit of 2–3 million bpd, leading to fuel rationing and industrial curtailments. The government would prioritize military, food production, and key industries.
Beijing has several advantages: overland pipelines from Russia and Central Asia (Kazakhstan), a massive SPR, and leverage over Iran as a diplomatic ally. China could also accelerate purchases from Venezuela and other sanctioned nations. However, the global oil market would be in chaos, and no single country can fully replace 5 million bpd of lost Gulf supply. China is also expanding its navy's presence in the Gulf to protect tankers.
China's energy security strategy emphasizes diversification of supply routes (the 'Belt and Road Initiative' includes energy corridors), building strategic reserves, and promoting renewable energy. However, oil remains the single largest source of imported energy. A Hormuz closure would test China's ability to mobilize its massive SPR and redirect global flows. Unlike Japan or Korea, China has alternative overland routes from Russia and Central Asia, but volumes are insufficient to replace Gulf supplies entirely.
China has the lowest percentage dependency among major Asian importers, but the largest absolute volume transiting Hormuz (~5 million bpd). Any disruption would have global ripple effects.
China leads the world in renewable energy deployment (solar, wind, hydro, EVs) and is rapidly reducing oil intensity of GDP. However, oil demand is still growing, driven by petrochemicals and aviation. The government is accelerating the transition to electric vehicles (EVs now 40% of new car sales) and expanding nuclear capacity. But a sudden Hormuz closure would still hit China's industrial heartland hard.
Strategic pivot: Increasing reliance on the 'Power of Siberia' pipeline (expanding to 100 bcm/year) and boosting domestic exploration in the South China Sea.