Following the announcement on the 11th of 20 measures to further optimize the prevention and control of the new crown pneumonia epidemic, the joint prevention and control mechanism of the State Council held a press conference on the 12th on related topics. In recent years, Chinese officials have emphasized many times on different occasions to effectively ensure the normal production and living order of the people, and prevent simplification, "one size fits all" and "layers of overweight" behaviors in epidemic prevention and control.