The lung auscultation area includes the anterior chest auscultation area and the back auscultation area, and the order is generally from top to bottom, from front to back. 1. Location of the auscultation area: the anterior chest auscultation area is the supraclavicular fossa, upper, middle and lower midclavicular line, upper and lower anterior axillary line and upper and lower mid-axillary line, left and right sides, with a total of 16 auscultation sites. Dorsal auscultation area for the posterior axillary line, the lower, upper and lower interscapular area, subscapular area within the external, left and right sides, a total of 12 parts. 2. Auscultation, order: generally from the tip of the lungs, from top to bottom, respectively, to check the anterior chest, lateral chest and back, the anterior chest should be along the mid-clavicular line and anterior axillary line, the lateral chest should be along the mid-axillary line and the posterior axillary line; the back should be along the line of the scapulae, one by one intercostal, from top to bottom, and in the upper and lower, left and right symmetry of the parts for comparison. When lung auscultation is performed, the examinee takes a sitting, semi-recumbent or recumbent position. The muscles of the whole body should be in a relaxed state. If the subject is sitting on a stool, the body should not be tilted, the hands are naturally hanging down or placed on the knees, and the muscles of the whole body are relaxed. If the subject is sitting on a bed, the legs should not be straight. The chest should be fully exposed to avoid the stethoscope rubbing against the clothing and producing a murmur. During lung auscultation, the subject needs to take deep breaths and perform at least l to 2 breathing cycles at each site.