On the basis of Napoleon’s dictum “never interrupt your enemy while they are making a mistake”, there was a large incentive for China to do precisely nothing as Donald Trump displayed his determination to lose friends and induce market panic. Indeed, the Chinese advocates of passivity cited a social media meme attributed to President Xi Jinping: “Do nothing. Win.” Initially it was tempting for China to sit back and watch the US’s former allies recoil at Trump’s disruptive war on globalisation and let them realise that, by comparison, China represented an oasis of stability, modernity and predictability. China instead decided...