This study will establish a registration research platform, a clinical research database and a biospecimen bank for the prevention and treatment of COPD with Chinese medicine. Based on the COPD registry database, a cohort of Chinese medicine for COPD prevention and treatment will be established.
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Frequencies of acute exacerbations (AEs)
Timeframe: Frequency of acute exacerbations at months 3, 6, 9, 12, 15, 18, 21, and 24.
Incidence of COPD
Timeframe: 24 months after enrollment.