The ground for the ethics of lockdown policies has radically shifted in the past three years. Libertarians started to be convinced that it is morally justifiable to impose constraints on liberties, including forced quarantine and social isolation. On September 7, according to the World Health Orignaztion, the mortality rate for COVID reached its lowest since March 9, 2020. I will take September 7 as the turning point for the ethics of the pandemic in this work. If we accept utilitarianism, deontology, or moral relativism, then, prior to the turning point, China’s Zero-COVID Policy was morally justified. Although China’s Zero-COVID Policy has remained controversial, I will propose that (1) the policy was justified on utilitarianism because it maximized utility, (2) the policy was justified on deontology because the policy is the Nash Equilibrium, and (3) the policy was justified on moral relativism because the policy was in accordance with the norms of the Chinese people.