US President Donald Trump’s landmark visit to China comes as the US-Iran war disrupts global energy supplies, fuels economic uncertainty and adds fresh strain to Washington-Beijing ties. In this story, part of a series examining how rivalry, interdependence and geopolitical crises are reshaping the relationship between the two powers, we examine how artificial intelligence (AI), chip controls and competing technology ecosystems are redefining US-China rivalry. Nvidia CEO Jensen Huang was the...