US and China must team up to keep maritime trade routes free and safe

With the end of the 60-day US-Iran memorandum of understanding, tensions in the Strait of Hormuz have flared again. The crisis in the strait highlights how the security and stability of key international waterways are becoming an increasingly urgent global concern.Over the past decade, major maritime routes have been affected by regional armed conflicts, geopolitical tensions and growing security risks. These disruptions have exposed a vulnerability in the global trading system: a key international waterway need not be formally “blocked” for shipping to become constrained.A strategic international strait may remain legally “open” while ships face military threats, attacks, higher insurance premiums, sanctions-related risks, forced re-routing or arbitrary conditions for passage. In such circumstances, the question is no longer simply whether the waterway is “open” or “closed”, but whether ships can pass through it safely, predictably and at a reasonable cost. This distinction matters significantly to both China and the United States.