Lung examination can be divided into the following aspects: 1, physical examination, vision, listening to the lungs, palpation, percussion is the most basic examination of the lungs, visual diagnosis can determine whether there is a deformed chest, barrel chest, chest undulation amplitude is normal, respiratory rate, etc.; relying on the stethoscope alone to identify the lungs of the respiratory sounds, whether there is a thickening, dry and wet rales or respiration has not been weakened, through the percussion and palpation can be found in the lung asymmetric movement, or solid lung sounds and turbid sounds can also suggest clinical lesions. Asymmetric lung movement, or solid and turbid sounds of the lungs can also indicate clinical lesions. 2, laboratory tests and imaging tests, laboratory tests can draw blood to check routine blood tests, Mycoplasma pneumoniae or Chlamydia, and can also check the indicators of lung tumors, and the common imaging tests are CT, enhanced CT, PET-CT, and invasive tests, that is, fiberoptic bronchoscopy, especially the imaging tests. The imaging tests, especially the imaging tests, need to be selected according to the needs of the disease.