The presence of sputum without coughing may be due to C pneumonia or other diseases, such as bacterial pneumonia, pharyngitis, gastroesophageal reflux, cardiac insufficiency, etc. The presence of sputum without coughing may be due to C pneumonia or other diseases. To differentiate whether it is a new crown pneumonia, we can improve the blood routine, lung CT, new crown virus nucleic acid test and other related examinations. If the patient has a drop in white blood cells, interstitial changes mainly in peripheral bands on chest radiographs or lung CT, and multiple positives for antibodies to the new coronavirus in the new coronavirus nucleic acid test, then the patient will be considered to have new coronavirus pneumonia. If the patient does not have abnormalities of the above indicators, it can be excluded from the new crown pneumonia, and other tests can be further improved to clarify the diagnosis.