Normalized Sequestration Control Area. Neocoronavirus pneumonia is what the World Health Organization has named 2019 Coronavirus Disease, which refers to pneumonia caused by infection with the new 2019 Coronavirus. Positive for the new coronavirus requires self-isolation treatment, and as of January 5, 2023 the Xining outbreak is a normalized closure and control area. As the new coronavirus continues to mutate, the pathogenicity shows a weakening trend, coupled with the popularity of vaccination and the accumulation of experience in prevention and control, it provides an opportunity to optimize the prevention and control of the epidemic.