I can’t read ‘China rocked by protests’ and ‘Zero Covid could be the end of Xi Jinping’s rule’ without recalling 4 May 1989, when I watched chanting students march into Tiananmen Square and overheard the British ambassador Sir Alan Donald declare: ‘There, you see how liberal China is becoming.’ I was a banker back then and had just visited the People’s Bank of China to discuss its appetite for investing in UK government debt – having flown up from Hong Kong, where business was booming under the reassurance that the British-run outpost’s way of life would remain unchanged for 50...