Recently, the National Health Commission announced that novel coronavirus pneumonia was renamed as novel coronavirus infection. According to the announcement, with the approval of the State Council, from January 8, 2023, the measures for the prevention and control of Class A infectious diseases stipulated in the Law of the People's Republic of China on the Prevention and Treatment of Infectious Diseases against novel coronavirus infection will be lifted; The novel coronavirus infection is no longer included in the quarantine infectious disease management under the Frontier Health and Quarantine Law of the People's Republic of China. This means that COVID-19 infection will be adjusted from "Class B A tube" to "Class B B tube". The infection of COVID-19 with "Class B and Class B" is a major adjustment of China's epidemic prevention and control policy. According to the relevant provisions of the Law on the Prevention and Control of Infectious Diseases, Class A infectious diseases in China include pestis and cholera. Class B infectious diseases managed by reference to Class A include SARS and pulmonary anthrax in anthrax. The down-regulation of management standards for COVID-19 infection is to confirm that it is less harmful to human body at present in terms of systems and procedures, and it is no longer necessary to take strict and meticulous Class A management measures for infectious diseases to prevent and control. This major adjustment also means that the economic and social production and living order affected by COVID-19 for more than three years will gradually return to the right track, and the long lost fireworks will return to our lives. The management of Class B infectious diseases by referring to Class A is an important measure and effective practice of the Chinese government to ensure people's life safety and health to the greatest extent. Before that, after the emergence of new infectious diseases such as SARS in 2003, highly pathogenic avian influenza in 2005, and influenza A (H1N1) in 2009, China was the first to include them in Class B infectious diseases, but implemented control measures for Class A infectious diseases. Infectious diseases are coming fiercely, and our country has a large population. When we have not yet done something about the pathology, infectivity, and degree of harm of infectious diseases, strict management measures should be taken to protect the people. When a clear judgment is made on the new infectious diseases, the relevant national departments will dynamically adjust the management level according to the time and situation. SARS and avian influenza, which have left a deep memory in the minds of the Chinese people, have also adopted "Category B, Category A", but were immediately returned to "Category B, Category B" after the epidemic was effectively controlled. With the infection of COVID-19, the focus of medical work in China will change in the future. In terms of epidemic prevention and control, we should change from infection prevention and control to medical treatment, and take corresponding measures around "health protection and severe disease prevention". Taking this opportunity, we should strengthen the critical care capacity of tertiary medical institutions, increase the number of ICU beds, increase the number of doctors and nurses in critical care, and strive to improve the critical care capacity of China. At the same time, it is timely to actively implement and promote the hierarchical diagnosis and treatment system. The unnecessary medical treatment pressure will be transferred from the tertiary hospitals to the secondary hospitals, the primary hospitals and community health centers, and family health doctors, so that the medical needs of residents can be met in a timely manner, while avoiding the run on medical resources, and ensuring the emergency medical treatment needs of the vulnerable people with severe and basic diseases. It must be soberly recognized that although COVID-19 infection has been adjusted to "Class B and Class B", it is still an infectious disease, and people should still do a good job in personal protection, and should not have "good morning, good morning"