A Study to Evaluate 9MW1911 in Patients With Chronic Obstructive Pulmonary Disease (COPD)

1.Current diagnosis of asthma or documented history of asthma; 2.Diagnosis of Alpha-1 Antitrypsin Deficiency； 3.History of other clinically significant pulmonary diseases apart from COPD: such as sarcoidosis,interstitial lung diseases, bronchiectasis,cystic fibrosis，constrictive bronchiolitis,severe pulmonary hypertension or other active pulmonary diseases; 4.Long-term treatment with oxygen (oxygen therapy time >15h/day) or mechanical ventilation, or clinically significant apnea requiring continuous positive airway pressure (CPAP) or non-invasive positive pressure ventilation (NIPPV); 5.History of lung pneumonectomy, or lung volume reduction within 12 months prior to screening，or planned to undergo lung volume reduction surgery (LVRS) during the study period; 6.Patients in the acute phase of pulmonary rehabilitation(participating in, or scheduled for a pulmonary rehabilitation program within 4 weeks of screening); 7.Uncured upper or lower respiratory tract infections during the screening period; 8.Moderate to severe COPD exacerbations within 4 weeks prior to screening or during the screening period； 9.Any infection requiring hospitalization for ≥24 hours and/or treatment with oral, IV, or IM antibiotics within 4 weeks prior to screening or during the screening period; 10.Received treatment with oral, IV, or intramuscular (IM) corticosteroids (>10 mg/day prednisone or equivalent dose) within 4 weeks prior to starting study medication; 11.Myocardial infarction, unstable angina within 12 months prior to screening;or heart failure (NYHA Class III or IV) within 6 months prior to screening； 12.History of ventricular arrhythmias or risk factors for ventricular arrhythmias, such as structural heart disease (e.g., severe left ventricular systolic dysfunction, severe left ventricular hypertrophy ), family history of unexplained sudden death or long QT syndrome； 13. experienced transient ischemic attack or stroke within 6 months prior to screening; 14.with unstable cardiovascular diseases, such as pulmonary embolism or deep vein thrombosis that occurred within 6 months before screening, which the researchers believe may put the patient at risk or have a negative impact on the research results; 15.Known active tuberculosis or nontuberculous mycobacterial infection (subjects with positive interferon - γ release assay (IGRA) during the screening period, if evaluated as inactive tuberculosis by the researcher based on clinical manifestations and imaging examinations, etc., can participate in this study); 16.Positive for human immunodeficiency virus antibody (HIV-Ab), or positive for hepatitis B surface antigen (HBsAg) with HBV-DNA copies > 1000 IU/mL or above the upper limit of normal (ULN) of the study center, or positive for hepatitis C virus antibody (HCV-Ab) with HCV-RNA copies above the ULN of the study center, or positive for Treponema pallidum antibody.