After debating whether it was about regime change, nuclear weapons, or the defanging of regional proxies, the United States and Israel’s war with Iran reached an impasse at the Strait of Hormuz. That twist has refocused attention on the world’s oceans and their critical role in interconnected global commerce. Few of us can insulate ourselves from trade that funnels through just a handful of key choke points. It’s a lesson China knows well: For some 25 years, it has been buying and building