"China is Iran's largest oil customer, a primary financial lifeline and a diplomatic shield." [largest oil customer]
This sentence directly names the three structural mechanisms — trade dependency, financial access, and diplomatic cover — through which China exercises leverage without military force, which is the core claim of the signal.
Reasoning from this article
The article treats China's Iran posture as an instance of a broader model: states that anchor themselves as indispensable economic partners gain veto-adjacent influence over partners' strategic decisions. This dynamic is not unique to China-Iran; it mirrors China's leverage over commodity-dependent states across Africa, Southeast Asia, and Central Asia. The structural implication is that economic interdependence is increasingly a substitute for — not merely a complement to — military power projection in shaping regional conflict outcomes.