When choosing a medical institution, we must first identify the "qualification" of its structure, personnel and equipment. The so-called "institutional qualification" is a legal medical institution license registered by the health administrative department; The so-called "personnel qualification" is the professional license of medical examination doctors and nurses; The so-called "qualified equipment" means that the medical examination equipment has the medical device approval certificate, good maintenance and application status. These three appraisals are the basis of physical examination quality. Although the medical equipment assembled and borrowed temporarily everywhere is cheap, the quality assurance is definitely doubtful.