Older adults / Participants: Inclusion criteria  Aged 60 or above who are mainly cared for by an informal caregiver and willing to participate the DPM together scored >6 in the Abbreviated Mental Test; a cut-off point of 6 is valid in differentiating between normal and abnormal cognitive functions for geriatric clients29 Can understand Cantonese Have a history of non-cancer pain in the past 6 months Have a pain score of at least 2 on the Numeric Rating Scale (0-11 numeric scale) Able to take part in light exercise and stretching One member of the dyad owns a smart phone and can access the Internet  Older adults / Participants: Exclusion criteria  Have a serious organic disease or malignant tumor Have a mental disorder diagnosed by neurologists or psychiatrists Will have further medical/surgical treatment in two months Experienced drug addiction18  Informal Caregivers : Inclusion criteria  Aged 18 or above As an informal caregiver for the participating older adult scored >6 in the Abbreviated Mental Test; a cut-off point of 6 is valid in differentiating between normal and abnormal cognitive functions for geriatric clients Can understand Chinese Have a history of non-cancer pain in the past 6 months Have a pain score of at least 2 on the Numeric Rating Scale (0-11 numeric scale) Able to take part in light exercise and stretching Own a smart phone and can assess the internet Able to attend the whole sessions in community activity center  Informal Caregivers: Exclusion criteria  Have serious organic disease or malignant tumor Have a history of consciousness or mental disorder diagnosed by neurologists or psychiatrists Have a further medical/surgical treatment in two months or have joined in other pain management program Experience a drug addiction problem