The video serves as a poignant reminder of the human cost of China’s prized zero-Covid policy, which has helped the country quell multiple resurgences of the virus. The elimination playbook consists of placing entire neighborhoods under lockdown, testing millions of residents in a matter of days, and swiftly isolating infected people and their close contacts in designated facilities. This time, the strict measures were applied to schoolchildren — among whom the outbreak was first detected and spread quickly. In Putian, 57 of its recently reported 129 cases are under the age of 12, according to the government. To prevent further transmission, infected children as young as kindergarten age are separated…