How did one factory in Taiwan become the sole reason why new cars, iPhones, gaming consoles and consumer whitegoods are facing delays in production? SCMP tech editors John Artman and Zhou Xin pull apart the circumstances that created this global supply chain crisis, how the US tech war and the pandemic created this situation and analyse what China is doing to become self-sufficient in chip manufacture. Can it catch up - or will it simply invade and take over production?