"Trump's war in the Middle East and the US naval blockade of Venezuela may change that calculus." [Trump's war in the Middle East]
The article traces a concrete chain: Trump's Middle East policy cuts Iran supply (13% of Chinese oil), Venezuela blockade cuts 4% of Chinese imports, and Gulf instability threatens 42% from other Gulf states. With diversification options eliminated, China's new five-year plan now includes a Russian gas pipeline. This generalizes beyond energy: when a dominant power constrains a secondary power's options, it forces that secondary power into dependent relationships with other secondary powers, inverting the intended isolation effect.