Inclusion Criteria:  A confirmed diagnosis of AECOPD. Age between 40 and 80 years. mMRC score ≥ 3. Barthel index<50. With the informed consent signed.  Exclusion Criteria:  Patients with severe cognitive impairment, dementia and various psychosis. Combined with severe arthritis and other osteoarthritis affecting the movement. Dyskinesia due to neuromuscular diseases. Long term bedridden for various reasons. Participating in other trials.