
China has long known about nuclear high-altitude electromagnetic pulse (HEMP) and invested in protecting military forces and critical infrastructures from HEMP and other nuclear weapon effects during the Cold War, and continuing today. China has HEMP simulators and defensive and offensive programs that are almost certainly more robust than any in the United States. China’s military doctrine regards nuclear HEMP attack as an extension of information or cyber warfare, and deserving highest priority as the most likely kind of future warfare.