Rehabilitation of chronic obstructive pulmonary disease (COPD) Patients with chronic obstructive pulmonary disease (COPD) have a reduced quality of life and a large economic burden, especially in the late stage, and treatment is not only pharmacological but also pulmonary rehabilitation is necessary. Pulmonary rehabilitation exercises for patients with chronic obstructive pulmonary disease (COPD) are aimed at improving patients’ cardiopulmonary exercise capacity. Respiratory exercise training method: Weak people can do it in bed, and those who are in good health should exercise in the standing position. The training is based on abdominal breathing exercises. Abdominal breathing is to improve lung function by enhancing diaphragmatic activity and increasing ventilation. Patients can undergo a 12-week rehabilitation exercise, twice a week, with a 15-minute relaxation training before the end of the exercise. The duration of each exercise is about 0.5 h. The evaluation will be made at the end of the exercise. (1)Recumbent exercise: Lie on your back with your head slightly elevated and both hands naturally placed on your abdomen. Do abdominal breathing. When inhaling, try to keep the chest still and push the abdomen forward; when exhaling, try to concave the abdomen inward. Exhale with the mouth, lips contracted like whistling. Not forcefully, slowly exhale from between the teeth or lips, exhale requires 1-2 times longer than inhalation (that is, exhale: suction = 2-3:1). (2) standing exercises: two hands crossed waist or hands on the abdomen, feet slightly open to the sides. Exhale deeply when both hands compress the sides of the thorax or compress the upper abdomen as much as possible to make the abdomen sunken, slowly exhale, inhalation, head backward slightly, both arms down, try to hold the abdomen, inhalation. Breathing exercise is preferable in the fresh outdoor air.