The images of the lungs are mostly black changes judging from imaging, and the presence of white shadows needs to be observed in several aspects: first of all, whether it is normal lung texture as well as vascular nodules, blood vessels and bronchi are described as white, striated and nodular on top of imaging. If the white shadows are patchy and large in size, it will be considered to belong to the category of pneumonia. If the white shadows are at the tips of the lungs, be on high alert for tuberculosis changes. If the white shadows are in both lower lungs, more often consider solid lung changes in both lower lungs, including bronchiectasis with infection, congenital pulmonary dysplasia, and alveolar stasis. Therefore, the size and location of the white shadows are helpful for the initial determination of whether it is an infectious or neoplastic lung disease, with the help of high-resolution CT of the chest, enhanced CT of the chest, PET-CT if necessary, and fiberoptic bronchoscopy can also be considered to do a special examination of the white shadows microscopically to see if there is bronchial obstruction to understand whether there is a tumor-related lesion.