Patients with neocoronavirus pneumonia may initially present with fever, respiratory symptoms, and gastrointestinal illness, with some patients having no obvious symptoms. C.N.C.P. is a disease induced by the infection of the lungs by the novel coronavirus. The incubation period of C.N.C.P. is 1~14 days, mostly 3~7 days, and it is relatively contagious 1~2 days before the onset of the disease and at the early stage of the disease. In the early stage of the disease, the patient will have fever, accompanied by dry cough, nasal congestion, runny nose, sore throat and other symptoms. Some patients also have symptoms of digestive disorders such as loss of appetite, fatigue, depression, nausea and vomiting, and diarrhea. It is important to note that there are also some patients who have no obvious symptoms, called asymptomatic infections, which can only be detected with the help of the Neocoronavirus pathogenicity test, i.e. nucleic acid test. The initial symptoms of the above mentioned patients are not specific, therefore, symptoms should not be relied on to determine whether they are infected or not. If they have a history of living in a high-risk area or close contact with a confirmed diagnosed person, they should inform the relevant organizations and undergo nucleic acid testing in a timely manner. Tip: “New coronavirus pneumonia” and “new coronavirus pneumonia” mentioned in this article were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.