The Middle East ceasefire is dead, and the U.S. has initiated a blockade of the Strait of Hormuz. Donald Trump is now threatening 50% tariffs on China for allegedly supplying air defense systems to Iran, creating a collision course between the world's two largest economies. While Beijing maneuvers to act as a mediator, its industrial dominance and military ties to Tehran are forcing a global economic decoupling that could collapse legacy industries and the AI trade.