In January, China’s National Bureau of Statistics made it official: After decades of fabulous GDP growth, the rate is now down to 3%. The culprit is Xi Jinping’s “zero-COVID” policy, plus ruptured supply chains and soaring energy prices. In the post-lockdown recovery, growth will of course bounce back, but not into the enduring double-digit rates prevailing since the 1980s, when China became the envy of the world.