This week, supermarkets in Beijing were hit with panic buying after only a few dozen confirmed cases stoked fears a lockdown was imminent. Apartment complexes have been locked up and barricaded due to infections inside. Not only are the lockdowns expensive, but investors are also wary of China's aggressive strategy, with the share market performing poorly this year and the local currency, the yuan, hitting a 17-month low. So, why are China's rulers still determined to use lockdowns in the pursuit of COVID zero? "It's the only playbook they have," Chang Chuan Chan, a health policy expert at Taiwan National...