A Study of CM310 in Subjects With Moderate to Severe Chronic Obstructive Pulmonary Disease

The study has two parts. Each part consists of three periods, including an up to 4-week screening period, a 52-week randomized treatment period, and a 8-week safety follow-up period. During the first part, patients who meet eligibility criteria will be randomized 1:1:1 to receive either CM310 300 mg, CM310 150mg or matched placebo subcutaneously every two weeks (Q2W) for a total of 26 times at the double-blind treatment period. An interim analysis will be performed and an optimal dose will be recommended. During the second part, patients will be randomized 1:1 to receive either CM310 optimal dose or matched placebo subcutaneously at the double-blind treatment period.