Inclusion criteria  Aged 18 years and above Diagnosis with COPD General condition stable Able to speak and read Chinese Able to complete the self-administered questionnaire Able to use instant messages such as WhatsApp or WeChat Mental, cognitive and physically fit for joining the trial as determined by the clinician or responsible investigator Signed informed consent  Exclusion criteria  Skeletal fragility Serious active infection Inability to walk Severe respiratory insufficiency