Mindful-Breath for People With COPD

Inclusion Criteria: * Age: 50-80 years * Sex: Male or female * Education level: Primary or above * Diagnosis: COPD (Baseline FEV1 \<80% and FEV1/FVC \<70% of predicted normal values) * Severity of COPD: Stage I to IV * Group of COPD: Group B, or E, based on 2024 GOLD guideline (36) * Clinical stability: No acute exacerbation in the past 4 weeks. Patients with recent acute exacerbation in the past 4 weeks will be screened again in subsequent follow-up. * Moderate stress: PSS score ≥14 (28) * Access to a mobile device (e.g., a smartphone, tablet, or laptop) with internet connectivity * Ability to read, communicate, and provide written consent in Chinese. Exclusion Criteria: * Engaging in \>60 minutes/week of moderate PA based on American Lung Association guidelines * Recent or ongoing receipt of other pharmacological/behavioral trials within the past 3 months * Contraindications or severe comorbidities that may limit full participation (mental diseases, deafness, limb activity disorder, coronary heart disease, arterial aneurysm, uncontrolled hypertension, pregnancy, etc) * Co-existing respiratory diseases (Asthma/interstitial lung disease/bronchiectasis) or active malignancies * Very severe COPD requiring long-term oxygen therapy or home non-invasive ventilation