The 6-minute self-test for COPD is unreliable, and the diagnosis of COPD needs to be combined with symptoms, imaging tests and lung function tests to make a comprehensive judgment. 1. Symptoms: Patients with chronic obstructive pulmonary disease (COPD) often have the typical symptoms of coughing, sputum, wheezing and stuffiness, which are aggravated during acute exacerbation and improved during remission, and are often triggered by infections. 2. Imaging examination: the chest ct of patients with chronic obstructive pulmonary disease (COPD) will often show changes of emphysema, in addition to the presence of small airway lesions. 3. Lung function test: the measurement of lung function is the gold standard for the diagnosis of chronic obstructive pulmonary disease (COPD), which can determine whether the patient has airflow limitation or not, and if the ratio of the first-second expiratory volume to the expiratory lung volume is less than 70%, then the patient can be diagnosed with chronic obstructive pulmonary disease (COPD). To summarize, the claim of 6-minute self-assessment of chronic obstructive pulmonary disease is unreliable, and patients who are suspected of suffering from chronic obstructive pulmonary disease need to go to regular hospitals in a timely manner to be examined and evaluated by professional physicians.