Adam Posen, the president of the Peterson Institute for International Economics, described China as suffering from a case of economic long Covid. In an article in the September-October issue of Foreign Affairs, he wrote: Like a patient suffering from that chronic condition, China’s body economic has not regained its vitality and remains sluggish even now that the acute phase — three years of exceedingly strict and costly “zero Covid” lockdown measures — has ended. The condition is systemic, and the only reliable cure — credibly assuring ordinary Chinese people and…