China has quietly accumulated the world's largest stockpile of crude oil, a development that is reshaping its energy relationship with the United States as Premier Xi Jinping prepares to host President Donald Trump for a state visit on May 14 and 15 [1]. The Chinese Commerce Ministry has banned domestic companies from complying with U.S. sanctions targeting small refineries, known as 'teapot refineries,' that import Iranian crude. These refineries have been encouraged by Chinese authorities to continue importing Iranian oil, as they are perceived to be immune to foreign sanctions, according to Teneo. This stance could prompt Washington to consider a second round of restrictions to curb Sino-Iranian oil trade [1].
According to Kpler, oil markets are now contending with a rapidly growing stock shock rather than a flow disruption, as most Middle East cargoes loaded before the war have been discharged, leading to an accelerated inventory drawdown and a slowdown in local refining [1]. The U.S. Energy Information Administration (EIA) estimates that China added an average of 1.1 million barrels per day of crude oil to its strategic reserves in 2025, with preliminary government data indicating continued inventory builds in 2026 ahead of the Iran conflict. As of December 2025, China's government and commercial oil stockpiles averaged around 360 million barrels, compared to America's nearly 414 million barrels in strategic reserves [1].
China's aggressive crude buying has helped prevent even higher spikes in oil prices during the Strait of Hormuz deadlock and has provided support to Asian importers most affected by the halt in Middle East energy deliveries [1]. The Oxford Energy Institute notes that China's strategic petroleum reserves are serving as a hedge against supply constraints, price volatility, and currency volatility amid heightened U.S.-China tensions and sanctions-related disruptions [1].
The ongoing war in Iran is expected to be the central topic at the Trump-Xi summit, potentially overshadowing other issues such as tariffs, rare earths, and artificial intelligence. China's strategic oil reserve buildup adds complexity to the energy dynamic between the two countries, making the upcoming meeting particularly critical for global markets [1].
CONCLUSION
China's rapid accumulation of crude oil reserves and its defiance of U.S. sanctions on Iranian oil imports are intensifying energy tensions ahead of the Trump-Xi summit. The evolving situation is expected to have significant implications for global oil markets and U.S.-China relations, with the Iran conflict likely to dominate the agenda.